@article{GDZPPN00245050X, title = {Minima of Vector Quadratic Forms with Applications to Statistics}, journal = {Metrika}, volume = {12}, year = {1967}, pages = {155-160}, zbl = {0158.37805}, url = {http://dml.mathdoc.fr/item/GDZPPN00245050X} }
Kabe, D.G. Minima of Vector Quadratic Forms with Applications to Statistics. Metrika, Tome 12 (1967) pp. 155-160. http://gdmltest.u-ga.fr/item/GDZPPN00245050X/