@book{404109, title = {Faktori\'aly a kombina\v cn\'\i\ \v c\'\i sla}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1985}, language = {cs}, url = {http://dml.mathdoc.fr/item/404109} }
Sedláček, Jiří. Faktoriály a kombinační čísla. GDML_Books (1985), http://gdmltest.u-ga.fr/item/404109/