@article{CMUC_1997__38_1_a4,
     author = {Pfeffer, Washek F.},
     title = {On variations of functions of one real variable},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {61--71},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1997},
     mrnumber = {1455470},
     zbl = {0888.26006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1997__38_1_a4/}
}