@inbook{403784,
title = {2. kapitola. Operace a grupy},
booktitle = {Druh\'y v\'ylet do modern\'\i\ matematiky},
series = {GDML\_Books},
publisher = {Mlad\'a fronta},
address = {Praha},
year = {1973},
pages = {51-93},
url = {http://dml.mathdoc.fr/item/403784}
}
(éd.). 2. kapitola. Operace a grupy, dans Druhý výlet do moderní matematiky, GDML_Books, (1973), pp. 51-93. http://gdmltest.u-ga.fr/item/403784/