@book{402864, title = {Neur\v cit\'e rovnice}, series = {GDML\_Books}, publisher = {Jednota \v ceskoslovensk\'ych matematik\r u a fyzik\r u}, address = {Praha}, year = {1949}, language = {cs}, url = {http://dml.mathdoc.fr/item/402864} }
Vyšín, Jan. Neurčité rovnice. GDML_Books (1949), http://gdmltest.u-ga.fr/item/402864/