On the existence of periodic solutions of some nonlinear functional differential equations with unbounded delay
2008 ◽
Vol 53
(2)
◽
pp. 97-103
◽
1998 ◽
Vol 221
(2)
◽
pp. 499-522
◽
1991 ◽
Vol 7
(1)
◽
pp. 74-79
1974 ◽
Vol 15
(2)
◽
pp. 350-378
◽
1986 ◽
Vol 102
(3-4)
◽
pp. 259-262
◽
1983 ◽
Vol 49
(3)
◽
pp. 415-429
◽
1979 ◽
Vol 72
(2)
◽
pp. 666-673
◽