Media type: E-Article Title: Morse lemma for functionals of variational calculus Contributor: Bobylev, N. A.; Burman, Yu. M. imprint: Springer Science and Business Media LLC, 1991 Published in: Functional Analysis and Its Applications Language: English DOI: 10.1007/bf01085485 ISSN: 0016-2663; 1573-8485 Keywords: Applied Mathematics ; Analysis Origination: Footnote: