%0 Journal Article %A Pavle V. M. Blagojević %A Günter M. Ziegler %T Tetrahedra on deformed spheres and integral group cohomology %J The electronic journal of combinatorics %D 2009 %V 16 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/82/ %R 10.37236/82 %F 10_37236_82