@article{1138833583,
author = {Stong, R. E.},
title = {The rank of an $f$-structure},
journal = {Kodai Math. Sem. Rep.},
volume = {29},
number = {1-2},
year = {1977},
pages = { 207-209},
language = {en},
url = {http://dml.mathdoc.fr/item/1138833583}
}
Stong, R. E. The rank of an $f$-structure. Kodai Math. Sem. Rep., Tome 29 (1977) no. 1-2, pp. 207-209. http://gdmltest.u-ga.fr/item/1138833583/