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.
Dynamics of an age structured epidemic model, S. Busenberg et al; entropy - an introduction, J. Ding and T.Y. Li; harmonic solutions and subharmonic solutions for periodic Lotka-Volterra systems, T.R. Ding and F. Zanolin; stability of Volterra difference equations of convolution type, S. Elaydi; polynomial systems with enough invariant algebraic curves, A. Gasull; bounded polynomial vector fields II, J. Libre; classes of quadratic systems of differential equations in the plane, J.W. Reyn; a new detecting method of conditions for the existence of Hopf bifurcation, J.Q. Shen and Z.J. Jing; asymptotic behaviour of solutions of functionally perturbed nonoscillatory second order differential equations, W.F. Trench; the estimation of solutions and the existence of periodic solutions of a mixed type of Volterra integro-differential equations, Y. Zhang and Y.F. Zhu. (Part contents).