@book{404099, title = {Funkcion\'aln\'\i\ rovnice}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1984}, language = {cs}, url = {http://dml.mathdoc.fr/item/404099} }
Davidov, Ljubomir. Funkcionální rovnice. GDML_Books (1984), http://gdmltest.u-ga.fr/item/404099/