On eigenfunction expansions of differential equations with degenerating weight
1996 ◽
Vol 6
(6)
◽
pp. 85-97
◽
1953 ◽
Vol 4
(1)
◽
pp. 254-266
◽
Eigenfunction expansions and scattering theory for perturbed elliptic partial differential equations
1972 ◽
Vol 25
(5)
◽
pp. 499-532
◽
1988 ◽
Vol 12
(1)
◽
pp. 65-99
◽
1959 ◽
Vol 65
(3)
◽
pp. 151-155