@article{GDZPPN000364088, title = {Complexes Whose Boundaries Cannot Be Pushed Around.}, journal = {Discrete \& computational geometry}, volume = {4}, year = {1989}, pages = {365-374}, zbl = {0676.57007}, url = {http://dml.mathdoc.fr/item/GDZPPN000364088} }
Bloch, E.D. Complexes Whose Boundaries Cannot Be Pushed Around.. Discrete & computational geometry, Tome 4 (1989) pp. 365-374. http://gdmltest.u-ga.fr/item/GDZPPN000364088/