@article{10_21136_CPM_1972_117751,
     author = {Budinsk\'y, Bruno},
     title = {Zum {Petrschen} {Satz}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {72--74},
     publisher = {mathdoc},
     volume = {097},
     number = {1},
     year = {1972},
     doi = {10.21136/CPM.1972.117751},
     mrnumber = {0307019},
     zbl = {0232.50001},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1972.117751/}
}