@article{AUCMP_2004__45_2_a5,
     author = {Krzempek, Jerzy and Plewik, Szymon},
     title = {Discontinuity points of exactly $k$-to-one functions},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {55--58},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {2004},
     mrnumber = {2138275},
     zbl = {1065.26003},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_2004__45_2_a5/}
}