@inbook{402939, title = {II. Kongruence}, booktitle = {\'Uvod do element\'arn\'\i\ teorie \v c\'\i seln\'e}, series = {GDML\_Books}, publisher = {Jednota \v cs. matematik\r u a fysik\r u}, address = {Praha}, year = {1931}, pages = {30-55}, url = {http://dml.mathdoc.fr/item/402939} }
(éd.). II. Kongruence, dans Úvod do elementární teorie číselné, GDML_Books, (1931), pp. 30-55. http://gdmltest.u-ga.fr/item/402939/