@article{10_4064_ba55_4_7,
     author = {G. J. Ridderbos},
     title = {Group {Structures} and {Rectifiability} in {Powers} of {Spaces}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {357--363},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {2007},
     doi = {10.4064/ba55-4-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba55-4-7/}
}