@article{CMUC_1977__18_3_a12,
     author = {Kone\v{c}n\'y, Milan},
     title = {Remarks on periodic solvability of nonlinear ordinary differential equations},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {547--562},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1977},
     mrnumber = {0470340},
     zbl = {0371.34026},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_3_a12/}
}