@article{AM2_1976__14_136571,
     author = {J. Drewniak and J. Kalinowski and B. Ulewicz},
     title = {On the behaviour of continuous real functions in the neighbourhood of a fixed point.},
     journal = {Aequationes mathematicae},
     pages = {123--136},
     year = {1976},
     volume = {14},
     zbl = {0324.26004},
     url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136571/}
}