Freedman, H. I.; Ruan, Shigui Uniform persistence in functional differential equations. (English) Zbl 0814.34064 J. Differ. Equations 115, No. 1, 173-192 (1995). The authors obtain some criteria for uniform persistence in retarded functional differential equations that can represent population interaction models with time delay. Reviewer: T.C.Gard (Athens / Georgia) Cited in 98 Documents MSC: 34K99 Functional-differential equations (including equations with delayed, advanced or state-dependent argument) 92D25 Population dynamics (general) Keywords:uniform persistence; retarded functional differential equations; population interaction models with time delay PDF BibTeX XML Cite \textit{H. I. Freedman} and \textit{S. Ruan}, J. Differ. Equations 115, No. 1, 173--192 (1995; Zbl 0814.34064) Full Text: DOI