@article{NSJOM_1976_6_Nonea_0,
     author = {Ivi\'c Aleksandar},
     title = {On a number-theoretical system of functional equations},
     journal = {Novi Sad Journal of Mathematics},
     pages = {1-5},
     publisher = {mathdoc},
     volume = {6},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1976_6_Nonea_0/}
}