"Deborin's materialist interpretation of Spinoza", Studies in Soviet Thought, Dordrecht, t. 24/3 (1982), p. 175-183. (anglais). N VI, 20.
"Did Spinoza have a double Aspect Theory ?", International Studies in Philosophy, Binghamton (N.Y.)/Torino, XIV, n°1 (1982), p. 1-16. (anglais). N V, 11.