Time Dependent Nonlinear Oscillations with Many Periodic Solutions
1987 ◽
Vol 18
(5)
◽
pp. 1294-1316
◽
2006 ◽
Vol 6
(1)
◽
pp. 71-93
◽
1976 ◽
Vol 55
(2)
◽
pp. 295-301
◽
1977 ◽
Vol 60
(3)
◽
pp. 747-754
◽
2009 ◽
Vol 52
(1)
◽
pp. 88-90
◽
Keyword(s):
Keyword(s):
1979 ◽
Vol 41
(2)
◽
pp. 229-251
◽