Periodic solutions of second-order wave equations. IV
1988 ◽
Vol 39
(3)
◽
pp. 270-275
◽
1987 ◽
Vol 38
(6)
◽
pp. 617-623
◽
1987 ◽
Vol 38
(5)
◽
pp. 505-511
◽
2009 ◽
Vol 58
(5)
◽
pp. 334-341
◽
1980 ◽
Vol 36
(1)
◽
pp. 20-27
◽
Keyword(s):
2005 ◽
Vol 18
(11)
◽
pp. 1256-1264
◽