@article{CMUC_1970__11_1_a1,
     author = {Koman, Milan},
     title = {On nonplanar graphs with the minimum number of vertices and a given girth},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {9--17},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1970},
     mrnumber = {0265199},
     zbl = {0195.25802},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1970__11_1_a1/}
}