2017
ZhuravlyovFlyorov - Discrete Analysis I ru
    692BC5A5704079ECEA93DC218A904213
2010
ZhuravlyovFlyorovVyalyi - Discrete Analysis - Formal Systems and Algorithms ru
    9331589A86E38EFF89D8C69A167F9605
    0DE22313AF3A465D770F60E81043A4C0
2007
ZhuravlyovFlyorovVyalyi - Discrete Analysis - High Algebra Fundamentals 2nd ed ru
    54F19635AD9BC5A7A08AE786A133F9D7
    !!!