@inbook{401427, title = {Obsah}, booktitle = {Z\'aklady teorie grupoid\r u a grup}, series = {GDML\_Books}, publisher = {Nakladatelstv\'\i\ \v ceskoslovensk\'e akademie v\v ed}, address = {Praha}, year = {1962}, pages = {7-13}, url = {http://dml.mathdoc.fr/item/401427} }
(éd.). Obsah, dans Základy teorie grupoidů a grup, GDML_Books, (1962), pp. 7-13. http://gdmltest.u-ga.fr/item/401427/