@article{GDZPPN000363510, title = {Invertible Relations on Polytopes.}, journal = {Discrete \& computational geometry}, volume = {2}, year = {1987}, pages = {395-400}, zbl = {0629.52013}, url = {http://dml.mathdoc.fr/item/GDZPPN000363510} }
Sallee, G.T. Invertible Relations on Polytopes.. Discrete & computational geometry, Tome 2 (1987) pp. 395-400. http://gdmltest.u-ga.fr/item/GDZPPN000363510/