@inbook{403830,
title = {3. kapitola. Otev\v ren\'e mno\v ziny},
booktitle = {Co asi nev\'\i te o vzd\'alenosti},
series = {GDML\_Books},
publisher = {Mlad\'a fronta},
address = {Praha},
year = {1974},
pages = {56-76},
url = {http://dml.mathdoc.fr/item/403830}
}
(éd.). 3. kapitola. Otevřené množiny, dans Co asi nevíte o vzdálenosti, GDML_Books, (1974), pp. 56-76. http://gdmltest.u-ga.fr/item/403830/