Functional Differential Equations and Bifurcation : Proceedings of a Conference Held at São Carlos Brazil July 2–7 1979 Liénard equations and control Periodic solutions of semilinear functional differential equations in a Hilbert space Stability of nonconservative linear systems An analysis of the characteristic equation of the scalar linear difference equation with two delays A liapunov functional for a matrix retarded difference differential equation with several delay A compactness theorem for integral operators and applications Periodic solutions of nonlinear autonomous hyperbolic equations Contact equivalence and bifurcation theory Some recent results on dissipative processes Volterra stieltjes integral equations Relationship in the neighbourhood of infinity and asymptotic equivalence of neutral functional differential equations Stability in functional differential equations Topological equivalence in bifurcation theory On a Hartree type equation: Existence of regular solutions Approximation solvability of some nonlinear operator equations with applications The levin nohel equation on the torus Non singular structural stable flows on three dimensional manifolds Qualitative properties of certain ordinary differential systems Applications of the integral averaging bifurcation method to retarded functional differential equations Moduli and bifurcations: Non transversal intersections of invariant manifolds of vectorfields Stability properties in almost periodic systems of functional differential equations.