@article{105559, author = {Svatopluk Fu\v c\'\i k and Vladim\'\i r Lovicar}, title = {Boundary value and periodic problem for the equation $x''(t)+g(x(t))=p(t)$}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {015}, year = {1974}, pages = {351-355}, zbl = {0284.34018}, mrnumber = {0348176}, language = {en}, url = {http://dml.mathdoc.fr/item/105559} }
Fučík, Svatopluk; Lovicar, Vladimír. Boundary value and periodic problem for the equation $x''(t)+g(x(t))=p(t)$. Commentationes Mathematicae Universitatis Carolinae, Tome 015 (1974) pp. 351-355. http://gdmltest.u-ga.fr/item/105559/
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