@article{CMUC_1992__33_1_a14,
     author = {Baars, Jan},
     title = {Equivalence of certain free topological groups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {125--130},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1992},
     mrnumber = {1173754},
     zbl = {0759.54022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1992__33_1_a14/}
}