Almost Periodic Solutions of Abstract Retarded Functional Differential Equations with Unbounded Delay

A general theory of heat conduction with finite wave speeds

Morton E. Gurtin, A. C. Pipkin · Archive for Rational Mechanics and Analysis · 1968 · 1.2K citations

Engineering, Mechanical Engineering, Physics +14

Stability Theory and the Existence of Periodic Solutions and Almost Periodic Solutions

T. Yoshizawa, Vimal Singh · IEEE Transactions on Systems Man and Cybernetics · 1979 · 474 citations

Natural Sciences, Mathematics, Physics +16

Self-adjoint, non-oscillatory systems of ordinary, second order, linear differential equations

Philip Hartman · Duke Mathematical Journal · 1957 · 142 citations

Natural Sciences, Mathematics, Physics +14

ONE-PARAMETER SEMIGROUPS OF POSITIVE OPERATORS (Lecture Notes in Mathematics 1184)

C. J. K. Batty · Bulletin of the London Mathematical Society · 1987 · 108 citations

Engineering, Electrical Engineering, Stochastic Processes +6

An abstract functional differential equation and a related nonlinear Volterra equation

Michael G. Crandall, John A. Nohel · Israel Journal of Mathematics · 1978 · 94 citations

Natural Sciences, Mathematics, Differential Equations +10