[Lecture Notes in Mathematics] Nonlinear Partial Differential Equations and Applications Volume 648 || A minimax principle and applications to elliptic partial differential equations
Chadam, J.M.Volume:
10.1007/BF
Year:
1978
Language:
english
DOI:
10.1007/bfb0066407
File:
PDF, 524 KB
english, 1978