Existence of positive periodic solutions for two types of second-order nonlinear neutral differential equations with variable delay
2013 ◽
Vol 32
(4)
◽
pp. 377-391
◽
2018 ◽
Vol 15
(3)
◽
2014 ◽
Vol 47
(1-2)
◽
pp. 291-314
◽
2005 ◽
Vol 18
(11)
◽
pp. 1256-1264
◽
2006 ◽
Vol 73
(2)
◽
pp. 175-182
◽
2010 ◽
Vol 82
(3)
◽
pp. 437-445
◽
2021 ◽
Vol 57
◽
pp. 103200
2015 ◽
Vol 144
(1)
◽
pp. 1-10
◽