@article{01247864,
title = {An extension of a result of Lewis.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {6},
year = {1999},
pages = {1-10},
zbl = {0928.15012},
language = {en},
url = {http://dml.mathdoc.fr/item/01247864}
}
Tam, Tin-Yau. An extension of a result of Lewis.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 6 (1999) pp. 1-10. http://gdmltest.u-ga.fr/item/01247864/