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@article{PIM_1966_N_S_06_20_a7, author = {D. \v{Z}. {\DJ}okovi\'c and R. \v{Z}. {\DJ}or{\dj}evi\'c and P. M. Vasi\'c}, title = {On {A} {Class} {Of} {Functional} {Equations}}, journal = {Publications de l'Institut Math\'ematique}, pages = {65 }, publisher = {mathdoc}, volume = {_N_S_06}, number = {20}, year = {1966}, url = {http://geodesic.mathdoc.fr/item/PIM_1966_N_S_06_20_a7/} }
D. Ž. Đoković; R. Ž. Đorđević; P. M. Vasić. On A Class Of Functional Equations. Publications de l'Institut Mathématique, _N_S_06 (1966) no. 20, p. 65 . http://geodesic.mathdoc.fr/item/PIM_1966_N_S_06_20_a7/