ON INTEGRAL SOLUTIONS ON NONAUTONOMOUS DELAY EQUATIONS AND THEIR PROPAGATION by Dyson, J, Villellabressan, R

A SEMIGROUP APPROACH TO NONLINEAR NONAUTONOMOUS NEUTRAL FUNCTIONAL-DIFFERENTIAL EQUATIONS by Dyson, J, Villellabressan, R

SEMIGROUPS OF TRANSLATIONS ASSOCIATED WITH FUNCTIONAL AND FUNCTIONAL-DIFFERENTIAL EQUATIONS by Dyson, J, Villellabressan, R

NON-LINEAR BOUNDARY PROBLEM FOR A FUNCTIONAL-DIFFERENTIAL EQUATION by Dyson, J, Villellabressan, R