@article{1256051482,
author = {Graddon, C. J.},
title = {$\mathfrak{F}$-speed, $\mathfrak{F}$-abnormal depth and $(R,\mathfrak{F})$-chains in certain locally finite groups},
journal = {Illinois J. Math.},
volume = {17},
number = {4},
year = {1973},
pages = { 646-665},
language = {en},
url = {http://dml.mathdoc.fr/item/1256051482}
}
Graddon, C. J. $\mathfrak{F}$-speed, $\mathfrak{F}$-abnormal depth and $(R,\mathfrak{F})$-chains in certain locally finite groups. Illinois J. Math., Tome 17 (1973) no. 4, pp. 646-665. http://gdmltest.u-ga.fr/item/1256051482/