Johnson Space Center, NASA, Houston, Texas, June 8, 1979. On nonlinear functional differential equations in Banach spaces. Johnson Space Center, NASA, Houston, Texas, June 13, 1979. Existence and uniqueness of solutions to nonlinear operator-differential equations with applications to automatic continuous control. Johnson Space Center, NASA, Houston, Texas, June 15, 1979.
Error estimates due to nonuniformly Lipschitzian perturbations of nonlinear differential equations.
Johnson Space Center, NASA, Houston, Texas, July 6, 1979. Existence and uniqueness of solutions for a class of nonlinear integral equations which include generalized Placzek's equations of nuclear physics. Johnson Space Center, NASA, Houston, Texas, July 13, 1979. A priori global estimates in the theory of differential equations with applications to celestial mechanics. Johnson Space Center, NASA, Houston, Texas, April 9, 1980.