Gasinskaya, Eh. F.; Sibirskij, K. S. Affine Invarianten eines Systems mit quadratischen Nichtlinearitäten. (Russian) Zbl 0266.34047 Differ. Uravn. 9, 1371-1382 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Reviews MSC: 34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations 34C99 Qualitative theory for ordinary differential equations × Cite Format Result Cite Review PDF