@article{GDZPPN002026880, title = {Characterization of the Cosine (Russisch)}, journal = {Aequationes mathematicae}, volume = {9}, year = {1973}, pages = {121-128}, url = {http://dml.mathdoc.fr/item/GDZPPN002026880} }
SARKOVSKII, A.N. Characterization of the Cosine (Russisch). Aequationes mathematicae, Tome 9 (1973) pp. 121-128. http://gdmltest.u-ga.fr/item/GDZPPN002026880/