A new approach to second order linear oscillation theory
1983 ◽
pp. 328-345
◽
1982 ◽
Vol 45
(1)
◽
pp. 16-33
◽
1983 ◽
Vol 93
(2)
◽
pp. 475-494
◽
1982 ◽
Vol 85
(2)
◽
pp. 315-330
◽
2013 ◽
Vol 37
(2)
◽
pp. 257-264
◽
1968 ◽
Vol 74
(5)
◽
pp. 909-912
◽
1982 ◽
Vol 84
(4)
◽
pp. 539-539
◽
1991 ◽
Vol 14
(3)
◽
pp. 313-319
◽