@article{01555476, title = {Solution of a problem of G. P\'olya.}, journal = {Matematichki Vesnik}, volume = {48}, year = {1996}, pages = {47-50}, zbl = {0957.52004}, language = {en}, url = {http://dml.mathdoc.fr/item/01555476} }
Janković, Vladimir. Solution of a problem of G. Pólya.. Matematichki Vesnik, Tome 48 (1996) pp. 47-50. http://gdmltest.u-ga.fr/item/01555476/