@article{AM2_1986__31_137152,
     author = {Maciej Sablik},
     title = {On extending functions to solutions of some functional equations.},
     journal = {Aequationes mathematicae},
     pages = {142--146},
     publisher = {mathdoc},
     volume = {31},
     year = {1986},
     zbl = {0604.39005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__31_137152/}
}