@inbook{403651, title = {[Ob\'alka]}, booktitle = {Kongruence}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1968}, pages = {[i]-[ii]}, url = {http://dml.mathdoc.fr/item/403651} }
(éd.). [Obálka], dans Kongruence, GDML_Books, (1968), pp. [i]-[ii]. http://gdmltest.u-ga.fr/item/403651/