Putnam, C. R. An oscillation criterion involving a minimum principle. (English) Zbl 0037.34302 Duke Math. J. 16, 633-636 (1949). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents Keywords:Ordinary differential equations × Cite Format Result Cite Review PDF Full Text: DOI