The existence of positive almost periodic type solutions for some neutral nonlinear integral equation

Pseudo Almost Periodic Solutions of Some Differential Equations, II

Chenxiaoyu Zhang · Journal of Mathematical Analysis and Applications · 1995 · 284 citations

Natural Sciences, Mathematics, Differential Equations +11

Pseudo Almost Periodic Solutions of Some Differential Equations

Chenxiaoyu Zhang · Journal of Mathematical Analysis and Applications · 1994 · 278 citations

Natural Sciences, Mathematics, Physics +12

A periodicity threshold theorem for epidemics and population growth

Kenneth L. Cooke, James L. Kaplan · Mathematical Biosciences · 1976 · 148 citations

Life Sciences, Infectious Disease Control, Epidemiology +13

A fixed point theorem with application to an infectious disease model

Richard W. Leggett, Lynn R. Williams · Journal of Mathematical Analysis and Applications · 1980 · 71 citations

Veterinary Medicine, Immunology, Infectious Diseases +14

A Periodicity Threshold Theorem for Some Nonlinear Integral Equations

Roger D. Nussbaum · SIAM Journal on Mathematical Analysis · 1978 · 71 citations

Natural Sciences, Mathematics, Differential Equations +15