@book{403960, title = {Kombinatorika}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1980}, language = {cs}, url = {http://dml.mathdoc.fr/item/403960} }
Vrba, Antonín. Kombinatorika. GDML_Books (1980), http://gdmltest.u-ga.fr/item/403960/