@book{403696, title = {Dirichletov princ\'\i p}, series = {GDML\_Books}, publisher = {Mlad\'a fronta}, address = {Praha}, year = {1969}, language = {sk}, url = {http://dml.mathdoc.fr/item/403696} }
Bukovský, Lev; Kluvánek, Igor. Dirichletov princíp. GDML_Books (1969), http://gdmltest.u-ga.fr/item/403696/