@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/