@article{1177706879,
author = {Graybill, Franklin A. and Marsaglia, George},
title = {Idempotent Matrices and Quadratic Forms in the General Linear Hypothesis},
journal = {Ann. Math. Statist.},
volume = {28},
number = {4},
year = {1957},
pages = { 678-686},
language = {en},
url = {http://dml.mathdoc.fr/item/1177706879}
}
Graybill, Franklin A.; Marsaglia, George. Idempotent Matrices and Quadratic Forms in the General Linear Hypothesis. Ann. Math. Statist., Tome 28 (1957) no. 4, pp. 678-686. http://gdmltest.u-ga.fr/item/1177706879/