@article{GDZPPN00207883X,
title = {Two Non-Negative Quadratic Forms.},
journal = {Elemente der Mathematik},
volume = {28},
year = {1973},
pages = {141-146},
zbl = {0266.52006},
url = {http://dml.mathdoc.fr/item/GDZPPN00207883X}
}
Klamkin, Murray S. Two Non-Negative Quadratic Forms.. Elemente der Mathematik, Tome 28 (1973) pp. 141-146. http://gdmltest.u-ga.fr/item/GDZPPN00207883X/