@article{10_21136_CPM_1981_118089,
     author = {Zelinka, Bohdan},
     title = {Intersection number of a graph},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {223--225},
     publisher = {mathdoc},
     volume = {106},
     number = {3},
     year = {1981},
     doi = {10.21136/CPM.1981.118089},
     mrnumber = {629720},
     zbl = {0471.05039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1981.118089/}
}