&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Differential Equations and Their Applications : Proceedings of a conference held in Prague, September 1962 / Ed. by Ivo Babuśka. &mdash; Prague : Publishing House of the Czechoslovak Academy of Sciences : Academic Press, 1963. &mdash; 247 p. : Ill.<br><br><br>Babuśka, Ivo, ред.<br><br>УДК: 517.9(063) <br><br>[ SYS NUM: 30078 ]