%0 Journal Article %A Barr, Michael %A Kennison, John F. %A Raphael, Robert %T Contractible simplicial objects %J Commentationes Mathematicae Universitatis Carolinae %D 2019 %P 473-495 %V 60 %N 4 %U http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2019.023/ %R 10.14712/1213-7243.2019.023 %G en %F 10_14712_1213_7243_2019_023