Zomonov, B. D. Hinreichende Bedingungen der Existenz positiver Zyklen für Systeme mit limitierenden Faktoren. (Russian) Zbl 0402.34033 Sib. Mat. Zh. 19, 1395-1398 (1978). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Review MSC: 37-XX Dynamical systems and ergodic theory Keywords:Existence of Positive Cycles; Plane Dynamical System PDFBibTeX XMLCite \textit{B. D. Zomonov}, Sib. Mat. Zh. 19, 1395--1398 (1978; Zbl 0402.34033)