@book{400448, title = {Bernard Bolzano a jeho v\'yznam v mathematice}, series = {GDML\_Books}, publisher = {UK Praha [?]}, address = {Praha}, year = {1926}, language = {cs}, url = {http://dml.mathdoc.fr/item/400448} }
Petr, Karel. Bernard Bolzano a jeho význam v mathematice. GDML_Books (1926), http://gdmltest.u-ga.fr/item/400448/