@article{1183510490,
author = {Alexander, J. W.},
title = {Gratings and homology theory},
journal = {Bull. Amer. Math. Soc.},
volume = {53},
number = {12},
year = {1947},
pages = { 201-233},
language = {en},
url = {http://dml.mathdoc.fr/item/1183510490}
}
Alexander, J. W. Gratings and homology theory. Bull. Amer. Math. Soc., Tome 53 (1947) no. 12, pp. 201-233. http://gdmltest.u-ga.fr/item/1183510490/