The Variational Problems and Equivalent Forms for a Second Order Elliptic Boundary Value Problem
1999 ◽
Vol 234
(1)
◽
pp. 246-264
2002 ◽
Vol 40
(1)
◽
pp. 307-318
◽
1966 ◽
Vol 72
(1)
◽
pp. 325-341
◽
2011 ◽
Vol 268-270
◽
pp. 1021-1024
2003 ◽
Vol 41
(4)
◽
pp. 1370-1387
◽
2020 ◽
Vol 491
(2)
◽
pp. 124369
1993 ◽
Vol 64
(6)
◽
pp. 1351-1362
◽