@inbook{403890, title = {[Ob\'alka]}, booktitle = {Princip matematick\'e indukce}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1977}, pages = {[i]-[ii]}, url = {http://dml.mathdoc.fr/item/403890} }
(éd.). [Obálka], dans Princip matematické indukce, GDML_Books, (1977), pp. [i]-[ii]. http://gdmltest.u-ga.fr/item/403890/