Kurzweil, J. The averaging principle and its applications in partial differential equations. (English) Zbl 0145.12101 Zagadnienia Drgań Nieliniow. 5, 142-147 (1963). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:ordinary differential equations PDF BibTeX XML Cite \textit{J. Kurzweil}, Zag. Drgań Nieliniowych 5, 142--147 (1963; Zbl 0145.12101) OpenURL