@inbook{402725,
title = {\'Uvahy z\'akladn\'\i },
booktitle = {\'Uvod do neeukleidovsk\'e geometrie},
series = {GDML\_Books},
publisher = {Jednota \v Ceskoslovensk\'ych matematik\r u a fysik\r u},
address = {Praha},
year = {1926},
pages = {75-99},
url = {http://dml.mathdoc.fr/item/402725}
}
(éd.). Úvahy základní, dans Úvod do neeukleidovské geometrie, GDML_Books, (1926), pp. 75-99. http://gdmltest.u-ga.fr/item/402725/