TY-JOUR AU-Bisonvatyi kogan，G.S.PY-2001 DA-1900/01/01 TI-黑洞SP-451313 VL-6 AB-SN-1026-0226 UR-https://doi.org/10.1155/S1026022601000309 DO-10.1155/S1022601000309 JF-自然与社会中的离散动力学PB-印度教出版公司KW-ER-