Zeidler, Eberhard Nonlinear functional analysis and its applications. Vol. 3: variational methods and optimization/ Eberhard Zeidler ; translated by Leo F. Boron. - New York: Springer-Verlag, c1985. - xxii, 662 p.: ill.; 25 cm. Includes bibliographies and indexes. ISBN: 038790915X 354090915X Subjects--Topical Terms: Nonlinear functional analysis.Analyse fonctionnelle. Dewey Class. No.: 515.7 / Z45n