Barbălat, I. Systèmes d’équations différentielles d’oscillations non linéaires. (French) Zbl 0090.06601 Acad. Républ. Popul. Roum., Rev. Math. Pur. Appl. 4, 267-270 (1959). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 278 Documents Keywords:ordinary differential equations PDF BibTeX XML Cite \textit{I. Barbălat}, Acad. Republ. Popul. Roum., Rev. Math. Pur. Appl. 4, 267--270 (1959; Zbl 0090.06601)