Elliptic curves defined over imaginary quadratic number fields. A diophantine approach. VRB Groningen 1975, 108 pages (PhD thesis, University of Amsterdam).
(with J.F. Kaashoek) Discovering Mathematics with Maple. An Interactive Exploration for Mathematicians, Engineers and Econometricians. Birkhäuser Verlag, Basel 1999, xvii + 227 pages. ISBN 3764360917.
This book introduces Maple in a rather special way; namely, it shows how a computer algebra system most naturally fits into a mathematical oriented work environment.
The
book distinguishes itself from existing ones in the following
ways:
 It instructs the reader about the use of Maple by
posing problems of a strictly mathematical nature.
 It is intended not as a mere introduction to Maple,
but also to show how Maple  and other computer
algebra systems  may enrich our knowledge and deepen our
understanding of mathematics. In that respect it focusses on
mathematics rather than on Maple. In doing this it
tries to convince scientists who are not naturally inclined to
incorporate the computer into their daily work routine that a
computer algebra system may very well enhance their
theoretical work.
The intended audience is the mixed group of mathematicians, econometricians, engineers, and other scientists, principally those who in their chosen discipline need to work with mathematical ideas and techniques. Also see the homepage of the book.
2015  On the shape of a violin, Mathematics Magazine 88(4), 247259. Data points are contained in Stradpoints.  
2012  (with W.Y. Pong) Diophantine Equations of Matching Games II, Acta Arithmetica 151 (3), 311323.  
2006  On Qderived polynomials, Rocky Mountain Journal of Mathematics 36(5), 17051713.  
2004  (with B.M.M. de Weger) On integral zeroes of binary Krawtchouk polynomials. In: N. Virchenko, I. Katchanovski, V. Haidey, R. Andrushkiw & R. Voronka (Eds.). Development of the mathematical ideas of Mykhailo Kravchuk (Krawtchouk). New York NY, USA. Shevchenko Scientific Society, 623633.  
2003  (with N. Tzanakis) Computing all integer solutions of
a genus 1 equation, Mathematics of Computation 72,
19351946. The very large X(u,v) and Y(u,v) of the degree 9 example are contained in largeXY.pdf. 

2000  (with N. Tzanakis) Computing All Integer Solutions of a General Elliptic Equation, In: Algorithmic Number Theory (ed. Wieb Bosma), Proceedings of the 4th International Symposium, ANTSIV, Leiden, July 2000, Lecture Notes in Computer Science 1838, Springer, 551561.  
1999  (with B.M.M. de Weger) Elliptic binomial diophantine equations, Mathematics of Computation 68, 12571281.  
1999  (with B.M.M. de Weger) Solving elliptic diophantine equations: the general cubic case, Acta Arithmetica LXXXVII.4, 339365.  
1999  (with N. Tzanakis) On
the elliptic logarithm method for elliptic diophantine
equations: Reflections and an improvement, Experimental
Mathematics 8:2, 135149. Additional material comprising tables of integer points are contained in st99pts.pdf or st99pts.ps. 

1999  (with B.M.M. de Weger) On integral zeroes of binary Krawtchouk polynomials, Nieuw Archief v. Wiskunde, Vierde Serie 17(2), 175186.  
1997  (with A. Bremner and N. Tzanakis) On the sum of consecutive squares, Journal of Number Theory 62, 3970.  
1996  (with B.M.M. de Weger) On a quartic diophantine equation, Proceedings of the Edinburgh Mathematical Society 39, 97114.  
1995  On the sum of consecutive cubes being a perfect square, Compositio Mathematica 97, 295307.  
1994  (with N. Tzanakis) Solving elliptic diophantine equations by estimating linear forms in elliptic logarithms, Acta Arithmetica LXVII.2, 177196.  
1994  (with J. Top) On the equation y^{2}=(x+p)(x^{2}+ p^{2}), Rocky Mountain Journal of Mathematics 24(3), 11351161.  
1994  (with B.M.M. deWeger) On elliptic diophantine equations that defy Thue's method. The case of the Ochoa curve, Experimental Mathematics 3, 209220.  
1994  (with P. Fischer) Some interesting logarithmic inequalities and a problem of Polya and Szego, Nieuw Archief voor Wiskunde (4th Series) 12, 119124.  
1992  Improvement of Nakamula's upper bound for the absolute discriminant of a sextic number field with two real conjugates, Mathematics of Computation 59, 203211.  
1991  On Thue equations associated with certain quartic number fields, In: Computational Number Theory (eds. Attila PethHo, Michael E. Pohst, Hugh C. Williams, Horst Günter Zimmer). Proceedings of the Colloquium on Computational Number Theory, Debrecen (Hungary), 1989, Walter de Gruyter, Berlin New York, 313319.  
1989  On diophantine equations of type x^{4} 2ax^{2}y^{2}by^{4}=1, Proceedings NATOAdvanced Study Institute on Number Theory and Applications (ed. R. Mollin). Banff 1988, 547553.  
1989  On quartic Thue equations with trivial solutions, Mathematics of Computation 52, 175187.  
1988  Brocard points, circulant matrices, and Descartes' folium, Mathematics Magazine 61, 172187.  
1988  (with N. Tzanakis) On the application of Skolem's padic method to the solution of Thue equations, Journal of Number Theory 29, 166195.  
1986  An inequality for Yff's analogue of the Brocard angle of a plane triangle, Nieuw Archief voor Wiskunde (4th Series) 4, 3345.  
1984  How to solve a diophantine equation. A number theoretic excursion, American Mathematical Monthly 91, 385392.  
1984  (with H.J.T. Hoogland) Brocardian geometry revisited, or some remarkable inequalities, Nieuw Archief voor Wiskunde (4th Series) 2, 281310.  
1983  Reduction of elliptic curves over imaginary quadratic number fields, Pacific Journal of Mathematics 108, 451463.  
1983  Approximations of the eigenvalues of the covariance matrix of a first order autoregressive process, Journal of Econometrics 22, 269279.  
1982  (with R. Tijdeman) Diophantine equations (including an appendix by P.L. Cijsouw, A. Korlaar and R. Tijdeman). In: Computational Methods in Number Theory Part II (eds: H.W. Lenstra Jr. and R. Tijdeman), Mathematical Centre Tracts 155, 321369.  
1981  On the diophantine equation (2y^{2}3)^{2}= x^{2}(3x^{2}2) in connection with the existence of nontrivial tight 4designs, Indagationes Mathematicae 43, 353358.  
1980  The diophantine equation (x^{2}+y)(x+y^{2})= N(xy)^{3}, Simon Stevin 54, 151163.  
1979  A class of diophantine equations connected with certain elliptic curves over Q(√13),Compositio Mathematica 38, 329346.  
1979  Application of nonlinear programming to plane geometry, Elemente der Mathematik 34, 18.  
1978  Aspects of elliptic curves: an introduction, Nieuw Archief voor Wiskunde (3rd Series) 26, 371413.  
1977  On a diophantine equation of E. Bombieri, Indagationes Mathematicae 39, 131139.  
1976

On the diophantine equation x^{3}Dy^{2}=1, Nieuw Archief voor Wiskunde (3rd Series) 24, 231254. 
Over a period of more than two decades I wrote many reports for the Report Series of the Econometric Institute. Most of these, in some form or other, were published in journals. The reports below have not (yet) been published in any other form.
9069/B  Improvement of Nakamula's upper bound for the absolute discriminant of a sextic number field with two real conjugates, 17 pages. The appendix gives the details of the symbolic computations of the 1992 publication in Mathematics of Computation.  
8607/B  (with N. Tzanakis) On certain norm form equations associated with a totally real biquadratic field, 38 pages.  
8216/M  On the shape of units in certain biquadratic number fields, 8 pages.  
8113/M  (with N.M. Stephens) The torsion group of elliptic curves over quadratic fields, 8 pages.  
8014/M  Factorization methods for solving diophantine equations, 27 pages.  
7701/M  TriangularSquarePentagonal numbers, 8 pages.  
7209  Elliptic curves over imaginary quadratic number fields, 16 pages. 
The following papers appeared in the Dutch language or were not subjected to any refereeing system.
2007  (in Dutch) De Viola da Gamba en de Gulden Snede, CMB Puurs (BE), 11 pages.  
1993  (in Dutch) Maple en Mathematica op de PC 1,2, Erasmus On Line 1(2) en 1(3), 2125, 1820, 38.  
1990  (in Dutch) Computer Algebra: Maple of Mathematica?, MacPROF 31, 1017.  
1989  (in Dutch) Expressionist versie 2.0, MacPROF 25, 2834.  
1988  A mathematician's personal view, The Web, Webster University Leiden, 24.  
1984  (in Dutch) Kleinste kwadraten methoden, CWI Syllabus 1, Vakantiecursus : HewetPlus Wiskunde, Mathematisch Centrum Amsterdam, 4361.  
1980  (in Dutch) De magische kubus, Sectief (Bulletin of the Econometric Institute of the EUR) nrs. 26 (1980), 27 and 29 (1981), 15 pages.  
1980  (in Dutch) Diophantische vergelijkingen (constructieve algebraïsche methoden), In: Number Theory and Computers, Mathematisch Centrum Amsterdam, 239260.  
1976  (in Dutch) Een interessante rij, Nieuw Tijdschrift voor Wiskunde 63 268274.  
1974  (in Dutch) Identiteiten voor de som, de som van de kwadraten, en de som van derde machten van natuurlijke getallen, Nieuw Tijdschrift voor Wiskunde 62, 94100.  
1972  (in Dutch) Pythagoras met een nevenvoorwaarde, Euclides 47, 217220.  
1970  Elliptic curves over Q(√2) with conductor N=(√2)^{n}, Manchester University, 50 pages.  
1970  Essay on the history of the diophantine equation y^{2}+k= x^{3}, Manchester University, 59 pages. 