Minimax principles for lower semicontinuous functions and applications to nonlinear boundary value problems
1986 ◽
Vol 3
(2)
◽
pp. 77-109
◽
1986 ◽
pp. 393-399
1990 ◽
Vol 147
(1)
◽
pp. 122-133
◽
1996 ◽
Vol 17
(5-6)
◽
pp. 605-637
◽
2021 ◽
Vol 81
◽
pp. 1-31
◽
1980 ◽
Vol 10
(1)
◽
pp. 35-58
◽