Duff, G. F. D. Limit-cycles and rotated vector fields. (English) Zbl 0050.09103 Ann. Math. (2) 57, 15-31 (1953). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 77 Documents Keywords:ordinary differential equations × Cite Format Result Cite Review PDF Full Text: DOI