@article{1183535145, author = {Porter, Tim}, title = {Obstructions in shape theory}, journal = {Bull. Amer. Math. Soc.}, volume = {79}, number = {5}, year = {1973}, pages = { 1206-1209}, language = {en}, url = {http://dml.mathdoc.fr/item/1183535145} }
Porter, Tim. Obstructions in shape theory. Bull. Amer. Math. Soc., Tome 79 (1973) no. 5, pp. 1206-1209. http://gdmltest.u-ga.fr/item/1183535145/