Nonlinear parabolic boundary value problems with upper and lower solutions
2005 ◽
Vol 56
(6)
◽
pp. 942-956
◽
1972 ◽
pp. 87-92
1990 ◽
Vol 87
(1)
◽
pp. 62-69
◽
1987 ◽
Vol 68
(3)
◽
pp. 429-443
◽
1989 ◽
Vol 13
(11)
◽
pp. 1303-1315
◽
1967 ◽
Vol 17
(2)
◽
pp. 248-261