Filippov, V. M.; Savchin, V. M.; Shorokhov, S. G. Variational principles for nonpotential operators. (Russian) Zbl 0766.49031 Itogi Nauki Tekh., Ser. Sovrem. Probl. Mat., Noveishie Dostizh. 40, 3-178 (1992). Reviewer: S.Balint (Timişoara) MSC: 49R50 PDF BibTeX XML Cite \textit{V. M. Filippov} et al., Itogi Nauki Tekh., Ser. Sovrem. Probl. Mat., Noveishie Dostizh. 40, 3--178 (1992; Zbl 0766.49031)
Filippov, V. M.; Savchin, V. M.; Shorokhov, S. G. Variational principles for nonpotential operators. (English. Russian original) Zbl 0835.58012 J. Math. Sci., New York 68, No. 3, 275-398 (1994). MSC: 58E30 58-02 34A34 47H99 47N20 49S05 49R50 70H05 PDF BibTeX XML Cite \textit{V. M. Filippov} et al., J. Math. Sci., New York 68, No. 3, 275--398 (1992; Zbl 0835.58012) Full Text: DOI