Applications of Variational Estimates and Generalized Perturbation Theory
1974 ◽
pp. 32-90
2001 ◽
Vol 28
(2)
◽
pp. 169-189
◽
1996 ◽
Vol 23
(8)
◽
pp. 681-693
◽
1988 ◽
Vol 15
(8)
◽
pp. 431-434
◽
1975 ◽
Vol 56
(1)
◽
pp. 107-112
◽
Keyword(s):
1988 ◽
Vol 99
(4)
◽
pp. 353-366
◽
1978 ◽
Vol 67
(1)
◽
pp. 91-106
◽