@article{AM2_1971__6_136196,
     author = {JOHN A. BAKER},
     title = {Regularity {Properties} of {Functional} {Equations}},
     journal = {Aequationes mathematicae},
     pages = {243--248},
     publisher = {mathdoc},
     volume = {6},
     year = {1971},
     zbl = {0223.39005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136196/}
}