Computational recreations in Mathematica. - Ilan Vardi (Addison-Wesley, 1991)

Prime Percolation. - Ilan Vardi (Exp. Math., 1998)

Discrete Derivatives of Sequences. - Y.-F. S. Pétermann; Jean-Luc Rémy; Ilan Vardi (Adv. Appl. Math., 2001)