Existence of nontrivial solutions for a nonlinear second order periodic boundary value problem with derivative term
2007 ◽
Vol 193
(2)
◽
pp. 560-571
◽
2004 ◽
Vol 155
(3)
◽
pp. 709-726
◽
2005 ◽
Vol 57
(7)
◽
pp. 1077-1088
◽
2017 ◽
Vol 7
(6)
◽
pp. 21-23