TY - BOOK AU - Shan-tao, Liao; Yen-chʻien, Yeh and Tong-Ren Ding TI - Dynamical systems: (VOL-4): Proceedings of the special program at Nankai Institute of Mathematics, Tianjin, China, September 1990-June 1991 SN - 9810213506 U1 - 515.352 PY - 1993/// CY - River Edge, London PB - World Scientific, N2 - Covers such topics as the dynamics of an age structured epidemic model; harmonic solutions and subharmonic solutions for periodic Lotka-Volterra systems; classes of quadratic systems of differential equations in the plane; and bounded polynomial vector fields II ER -