@book{402500,
title = {Element\'arn\'\i\ funkce},
series = {GDML\_Books},
publisher = {Jednota \v cesk\'ych matematik\r u a fysik\r u v Praze},
address = {Praha},
year = {1944},
language = {cs},
url = {http://dml.mathdoc.fr/item/402500}
}
Čech, Eduard. Elementární funkce. GDML_Books (1944), http://gdmltest.u-ga.fr/item/402500/