@article{10_4153_CJM_1970_140_5,
     author = {Patty, C. W.},
     title = {Homology of {Deleted} {Products} of {Contractible} {2-Dimensional} {Polyhedra.} {III}},
     journal = {Canadian journal of mathematics},
     pages = {1217--1223},
     year = {1970},
     volume = {22},
     number = {6},
     doi = {10.4153/CJM-1970-140-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-140-5/}
}