Singular Perturbation Elliptic Boundary-Value Problems in the Case of a Nonisolated Root of the Degenerate Equation
1993 ◽
Vol 101
(1)
◽
pp. 1-14
◽
1972 ◽
Vol 39
(1)
◽
pp. 208-226
◽
2008 ◽
Vol 11
(4-6)
◽
pp. 273-291
◽
1976 ◽
Vol 14
(3)
◽
pp. 471-472
2006 ◽
Vol 58
(2)
◽
pp. 244-262
◽
1991 ◽
Vol 69
(1)
◽
pp. 99-119
◽