@book{402910,
title = {Kru\v znice},
series = {GDML\_Books},
publisher = {Jednota \v ceskoslovensk\'ych matematik\r u a fyzik\r u},
address = {Praha},
year = {1950},
language = {cs},
url = {http://dml.mathdoc.fr/item/402910}
}
Setzer, Ota. Kružnice. GDML_Books (1950), http://gdmltest.u-ga.fr/item/402910/