@article{105417, author = {Svatopluk Fu\v c\'\i k and Jind\v rich Ne\v cas and Ji\v r\'\i\ Sou\v cek and Vladim\'\i r Sou\v cek}, title = {Strengthening upper bound for the number of critical levels of nonlinear functionals}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {013}, year = {1972}, pages = {297-310}, zbl = {0253.58006}, mrnumber = {0305169}, language = {en}, url = {http://dml.mathdoc.fr/item/105417} }
Fučík, Svatopluk; Nečas, Jindřich; Souček, Jiří; Souček, Vladimír. Strengthening upper bound for the number of critical levels of nonlinear functionals. Commentationes Mathematicae Universitatis Carolinae, Tome 013 (1972) pp. 297-310. http://gdmltest.u-ga.fr/item/105417/
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