@article{10_21136_CPM_1987_118321,
     author = {Koukol, Ji\v{r}{\'\i}},
     title = {Element\'arn{\'\i} d\r{u}kaz {Cauchyovy} v\v{e}ty pro jednodu\v{s}e souvisl\'e oblasti},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {257--260},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1987},
     doi = {10.21136/CPM.1987.118321},
     mrnumber = {905972},
     zbl = {0635.30004},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1987.118321/}
}