@article{AM2_1996__52_1-2_137670,
     author = {J. Matkowski and P. Kahlig and A. Matkowska},
     title = {On a class of composite functional equations in a single variable.},
     journal = {Aequationes mathematicae},
     pages = {260--283},
     publisher = {mathdoc},
     volume = {52},
     number = {1-2},
     year = {1996},
     zbl = {0861.39013},
     url = {http://geodesic.mathdoc.fr/item/AM2_1996__52_1-2_137670/}
}