Elsgolts, Lev Differential equations and the calculus of variations - Honolulu University Press of the Pacific 2004 - 440 p ISBN: 9781410210678 Subjects--Topical Terms: Mathematics LC Class. No.: 515 ELS 2004 Dewey Class. No.: 515 ELS 2004 National Library of Medicine Call No.: 515 ELS 2004