(NrELQTIWISTSKIE MODELI SPLO[NYH SRED (B/s - (N~ERNYJ(B, (NlEONID tIMOFEEWI^s ((NmOSKWA (B:s (NnAUKA(B,s, 1983)
Keywords: (NwARIACIONNOE IS^ISLENIEs; (NmEHANIKA SPLO[NYH SREDs -- (NmATEMATI^ESKOE MODELIROWANIEs