@article{PMFA_1972_17_3_a1,
     author = {Ehresmann, Charles},
     title = {Tendence k jednot\v{e} v matematice},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {121--129},
     year = {1972},
     volume = {17},
     number = {3},
     mrnumber = {0490612},
     zbl = {0236.00019},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1972_17_3_a1/}
}