Mishchenko, E. F.; Pontryagin, L. S. Relaxation oscillations and differential equations containing a small parameter with the senior derivative. (English) Zbl 0100.08601 Calcutta Math. Soc., Golden Jubilee Commemorat. Vol. (1958-1959) Part 1, 141-150 (1961). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:ordinary differential equations PDFBibTeX XML