انتشارات Mir
Secrets of the Second World War
G. Deborin, 2001
Selected Problems in Discrete Mathematics
G.P. Gavrilov, A.A. Sapozhenko, 1989
Fonctions speciales de la physique mathematique
A.NIKIFOROV, V.OUVAROV, 1983
División inexacta
Belski A.A., Kaluzhnin L.A.
