Spectral theory of ordinary differential operators
1982 ◽
Vol 62
(3)
◽
pp. 211-211
1958 ◽
Vol 10
◽
pp. 431-446
◽
1988 ◽
Vol 31
(1)
◽
pp. 49-66
◽
1982 ◽
Vol 14
(2)
◽
pp. 170-171
1971 ◽
Vol 39
(1)
◽
pp. 13-30
◽
Keyword(s):
1980 ◽
Vol 1980
(320)
◽
pp. 32-43