@article{10_21136_CPM_1975_108762,
     author = {Fu\v{c}{\'\i}k, Svatopluk and Lovicar, Vladim{\'\i}r},
     title = {Periodic solutions of the equation $x''(t)+g(x(t))=p(t)$},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {160--175},
     year = {1975},
     volume = {100},
     number = {2},
     doi = {10.21136/CPM.1975.108762},
     mrnumber = {0385239},
     zbl = {0319.34038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1975.108762/}
}