Oscillation theory of higher order linear functional-differential equations of neutral type
1988 ◽
Vol 18
(3)
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pp. 509-531
◽
1989 ◽
Vol 15
(2)
◽
pp. 415-432
◽
1990 ◽
Vol 148
(1)
◽
pp. 263-273
◽
2002 ◽
Vol 49
(7)
◽
pp. 929-945
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