Advanced Books
1986 Foundations of Infinitesimal Stochastic Analysis
(with J. M. Bayod), North Holland Studies in Logic and The Foundations of Math., vol. 119, Amsterdam, 478+pgs. reviews: Bull. London Math Soc. 1989, Med. van het Wis Genootschao 1989, BAMS 1989
1976 Introduction to the Theory of Infinitesimals
(in collaboration with W. A. J. Luxemburg), Academic Press Series on Pure and Applied Math, vol 72, 321+ pgs., reviewed BAMS vol 84, nr. 1(1978), SIAM Review, vol 20, nr. 2(1978), MR vol. 58 (1979) #10429