(NdIFFERENCIALXNOE IS^ISLENIE (B/s - (NlUZIN(B, (NnIKOLAJ nIKOLAEWI^s ((NmOSKWA (B:s (NsOWETSKAQ NAUKA(B,s, 1952)
Keywords: (NdIFFERENCIALXNOE IS^ISLENIEs -- (Nu^EBNIKI I POSOBIQs