@article{10_21136_CPM_1971_117709,
     author = {Vala, Josef},
     title = {\"Uber die {Torsalsysteme} des {Kongruenzenpaares}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {18--32},
     publisher = {mathdoc},
     volume = {096},
     number = {1},
     year = {1971},
     doi = {10.21136/CPM.1971.117709},
     mrnumber = {0283707},
     zbl = {0207.20202},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1971.117709/}
}