000 00447nmm a2200145Ia 4500
008 230125s9999||||xx |||||||||||||||||und||
020 _a9781475710809
100 _a BERESTYCKI
245 0 _aVariational Methods
250 _a1990
260 _bBirkhäuser Boston
_c1990
440 _aProgress in Nonlinear Differential Equations and Their Applications
650 _aMathematics and Statistics
856 _uhttps://doi.org/10.1007/978-1-4757-1080-9
999 _c5937
_d5937