@inbook{403685,
title = {[Ob\'alka]},
booktitle = {Stavba Loba\v cevsk\'eho planimetrie},
series = {GDML\_Books},
publisher = {Mlad\'a fronta},
address = {Praha},
year = {1969},
pages = {[i]-[ii]},
url = {http://dml.mathdoc.fr/item/403685}
}
(éd.). [Obálka], dans Stavba Lobačevského planimetrie, GDML_Books, (1969), pp. [i]-[ii]. http://gdmltest.u-ga.fr/item/403685/