@article{10_21136_CPM_1977_108463,
     author = {Zelinka, Bohdan},
     title = {A remark on isotopies of digraphs and permutation matrices},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {230--233},
     publisher = {mathdoc},
     volume = {102},
     number = {3},
     year = {1977},
     doi = {10.21136/CPM.1977.108463},
     mrnumber = {0472590},
     zbl = {0359.05025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1977.108463/}
}