@book{402947, title = {O rovnic\'\i ch}, series = {GDML\_Books}, publisher = {Jednota \v cesk\'ych matematik\r u a fysik\r u v Praze}, address = {Praha}, year = {1940}, language = {cs}, url = {http://dml.mathdoc.fr/item/402947} }
Schwarz, Štefan. O rovnicích. GDML_Books (1940), http://gdmltest.u-ga.fr/item/402947/