@article{AM2_1985__28_137036,
     author = {Karol Baron and Witold Jarczyk},
     title = {On approximate solutions of functional equations of countable order.},
     journal = {Aequationes mathematicae},
     pages = {22--34},
     publisher = {mathdoc},
     volume = {28},
     year = {1985},
     zbl = {0559.39006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137036/}
}