@article{CMUC_2001__42_1_a12,
     author = {Arhangel'skii, A. V. and Hu\v{s}ek, M.},
     title = {Extensions of topological and semitopological groups and the product operation},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {173--186},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2001},
     mrnumber = {1825381},
     zbl = {1053.54043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2001__42_1_a12/}
}