Variational methods to fourth-order impulsive differential equations
2009 ◽
Vol 35
(1-2)
◽
pp. 323-340
◽
2013 ◽
Vol 37
(1)
◽
pp. 95-105
◽
Keyword(s):
2008 ◽
Vol 51
(2)
◽
pp. 509-527
◽