@article{CMUC_1983_24_2_a2,
     author = {Studen\'y, Milan},
     title = {On the differentiation theorem in metric groups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {223--232},
     year = {1983},
     volume = {24},
     number = {2},
     mrnumber = {711260},
     zbl = {0525.28012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1983_24_2_a2/}
}