@article{DCG_1989__4_6_131086,
     author = {E.D. Bloch},
     title = {Complexes {Whose} {Boundaries} {Cannot} {Be} {Pushed}  {Around.}},
     journal = {Discrete & computational geometry},
     pages = {365--374},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1989},
     zbl = {0676.57007},
     url = {http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131086/}
}