@inbook{403988,
title = {\'Uvod},
booktitle = {Zaj\'\i mav\'e dvojice troj\'uheln\'\i k\r u},
series = {GDML\_Books},
publisher = {Mlad\'a fronta},
address = {Praha},
year = {1980},
pages = {3-6},
url = {http://dml.mathdoc.fr/item/403988}
}
(éd.). Úvod, dans Zajímavé dvojice trojúhelníků, GDML_Books, (1980), pp. 3-6. http://gdmltest.u-ga.fr/item/403988/