@article{GDZPPN002239876, title = {Homotopy uniqueness of BG2.}, journal = {Manuscripta mathematica}, volume = {95}, year = {1998}, pages = {471-498}, zbl = {0908.55009}, url = {http://dml.mathdoc.fr/item/GDZPPN002239876} }
Viruel, Antonio. Homotopy uniqueness of BG2.. Manuscripta mathematica, Tome 95 (1998) pp. 471-498. http://gdmltest.u-ga.fr/item/GDZPPN002239876/