@book{403901, title = {Rovinn\'e grafy}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1977}, language = {cs}, url = {http://dml.mathdoc.fr/item/403901} }
Zelinka, Bohdan. Rovinné grafy. GDML_Books (1977), http://gdmltest.u-ga.fr/item/403901/