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@article{CMUC_1990__31_2_a3, author = {Andres, J\'an}, title = {Note to the paper of {Fu\v{c}{\'\i}k} and {Mawhin}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {223--226}, publisher = {mathdoc}, volume = {31}, number = {2}, year = {1990}, mrnumber = {1077892}, zbl = {0715.34080}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1990__31_2_a3/} }
Andres, Ján. Note to the paper of Fučík and Mawhin. Commentationes Mathematicae Universitatis Carolinae, Tome 31 (1990) no. 2, pp. 223-226. http://geodesic.mathdoc.fr/item/CMUC_1990__31_2_a3/