@article{BUMI_2003_8_6B_3_a15,
     author = {Otera, Daniele Ettore},
     title = {On the simple connectivity at infinity of groups},
     journal = {Bollettino della Unione matematica italiana},
     pages = {739--748},
     publisher = {mathdoc},
     volume = {Ser. 8, 6B},
     number = {3},
     year = {2003},
     zbl = {1121.57004},
     mrnumber = {690848},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2003_8_6B_3_a15/}
}