Existence of periodic solutions of functional differential equations
1979 ◽
Vol 72
(2)
◽
pp. 666-673
◽
1991 ◽
Vol 7
(1)
◽
pp. 74-79
1974 ◽
Vol 15
(2)
◽
pp. 350-378
◽
1986 ◽
Vol 102
(3-4)
◽
pp. 259-262
◽
1987 ◽
Vol 3
(1)
◽
pp. 18-26
◽
1976 ◽
Vol 54
(3)
◽
pp. 634-652
◽
1978 ◽
Vol 82
(1-2)
◽
pp. 95-106
◽
2011 ◽
Vol 2011
◽
pp. 1-21
◽