@article{1256051756,
author = {Dade, E. C.},
title = {Block extensions},
journal = {Illinois J. Math.},
volume = {17},
number = {4},
year = {1973},
pages = { 198-272},
language = {en},
url = {http://dml.mathdoc.fr/item/1256051756}
}
Dade, E. C. Block extensions. Illinois J. Math., Tome 17 (1973) no. 4, pp. 198-272. http://gdmltest.u-ga.fr/item/1256051756/