Asymptotic solutions of singular perturbation problems for linear differential equations of elliptic type
1966 ◽
Vol 23
(1)
◽
pp. 26-86
◽
1979 ◽
Vol 71
(1)
◽
pp. 18-35
◽
1986 ◽
Vol 17
(2)
◽
pp. 422-450
◽
1942 ◽
Vol 33
(221)
◽
pp. 451-456
◽
1975 ◽
pp. 636-645
◽
1991 ◽
Vol 117
(3-4)
◽
pp. 215-223
◽
1986 ◽
Vol 102
(3-4)
◽
pp. 365-365
1949 ◽
Vol 67
(2)
◽
pp. 461-461
◽
1976 ◽
Vol 6
(4)
◽
pp. 761-766
◽
1990 ◽
Vol 11
(7)
◽
pp. 637-650
◽