@article{AM2_1978__18_136766,
     author = {Anders Lundberg},
     title = {Cliff functions - a tool for treating sequences of composed functions.},
     journal = {Aequationes mathematicae},
     pages = {35--53},
     publisher = {mathdoc},
     volume = {18},
     year = {1978},
     zbl = {0418.54014},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__18_136766/}
}