@book{404047, title = {P\v r\'\i mky a k\v rivky}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1982}, language = {cs}, url = {http://dml.mathdoc.fr/item/404047} }
Vasiljev, N. B.; Gutenmacher, V. L. Přímky a křivky. GDML_Books (1982), http://gdmltest.u-ga.fr/item/404047/