One-sided existence and uniqueness for periodic solutions of second-order ordinary differential equations
1986 ◽
Vol 10
(10)
◽
pp. 1123-1131
◽
2007 ◽
Vol 8
(1)
◽
pp. 222-229
◽
1977 ◽
Vol 61
(3)
◽
pp. 620-632
◽
1997 ◽
Vol 49
(8)
◽
pp. 1279-1285
◽
1974 ◽
Vol 16
(1)
◽
pp. 186-199
◽