@inbook{401372,
title = {13. O grup\'ach t\v r\'\i d},
booktitle = {\'Uvod do teorie grup},
series = {GDML\_Books},
publisher = {Kr\'alovsk\'a \v cesk\'a spole\v cnost nauk},
address = {Praha},
year = {1944},
pages = {63-68},
url = {http://dml.mathdoc.fr/item/401372}
}
(éd.). 13. O grupách tříd, dans Úvod do teorie grup, GDML_Books, (1944), pp. 63-68. http://gdmltest.u-ga.fr/item/401372/