00394nam a2200121Ia 4500082001900000100004000019245003800059260002700097300003600124490007600160500000500236700003100241  a515.7bL972.EF  aLusternik, L. A. and Sobolev, V. J.  aElements of functional analysisb  aDelhibHindustanc1961  aix, 411p. Index, Bibl. Appendix  aRussian monographs and texts on Advanced Mathematics and Physicsv v. 5  a  aSobolev, V. J. ; jt. auth.