@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/