@book{403944, title = {Matematika hrou i v\'a\v zn\v e}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1979}, language = {cs}, url = {http://dml.mathdoc.fr/item/403944} }
Zelinka, Bohdan. Matematika hrou i vážně. GDML_Books (1979), http://gdmltest.u-ga.fr/item/403944/