(NoGRANI^ENNAQ ZADA^A TREH TEL(B. (NpLOSKIE PERIODI^ESKIE ORBITY (B/s - (NbR@NO(B, (NaLEKSANDR dMITRIEWI^s ((NmOSKWA (B:s (NnAUKA(B,s, 1990)
(NbIBLIOGR(B.: (NS(B. 283-291s
Keywords: (NnEBESNAQ MEHANIKAs