@article{1178240982,
author = {Watson, Bill},
title = {$\delta $-commuting mappings and Betti numbers},
journal = {Tohoku Math. J. (2)},
volume = {27},
number = {4},
year = {1975},
pages = { 135-152},
language = {en},
url = {http://dml.mathdoc.fr/item/1178240982}
}
Watson, Bill. $\delta $-commuting mappings and Betti numbers. Tohoku Math. J. (2), Tome 27 (1975) no. 4, pp. 135-152. http://gdmltest.u-ga.fr/item/1178240982/