@article{1103043509, author = {O'Neill, Barrett}, title = {Induced homology homomorphisms for set-valued maps.}, journal = {Pacific J. Math.}, volume = {7}, number = {4}, year = {1957}, pages = { 1179-1184}, language = {en}, url = {http://dml.mathdoc.fr/item/1103043509} }
O'Neill, Barrett. Induced homology homomorphisms for set-valued maps.. Pacific J. Math., Tome 7 (1957) no. 4, pp. 1179-1184. http://gdmltest.u-ga.fr/item/1103043509/