@article{1102806460,
author = {Halpern, Benjamin},
title = {A general coincidence theory.},
journal = {Pacific J. Math.},
volume = {79},
number = {2},
year = {1978},
pages = { 451-471},
language = {en},
url = {http://dml.mathdoc.fr/item/1102806460}
}
Halpern, Benjamin. A general coincidence theory.. Pacific J. Math., Tome 79 (1978) no. 2, pp. 451-471. http://gdmltest.u-ga.fr/item/1102806460/