@inbook{403764, title = {[Ob\'alka]}, booktitle = {Booleova algebra}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1973}, pages = {[i]-[ii]}, url = {http://dml.mathdoc.fr/item/403764} }
(éd.). [Obálka], dans Booleova algebra, GDML_Books, (1973), pp. [i]-[ii]. http://gdmltest.u-ga.fr/item/403764/