@article{RM_1981_36_5_a13,
     author = {L. I. Kaplan},
     title = {Points of continuity of a~function and points where there is a~finite and an~infinite derivative},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {155--156},
     publisher = {mathdoc},
     volume = {36},
     number = {5},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1981_36_5_a13/}
}