TY - JOUR AU - Murray S. Klamkin TI - Two Non-Negative Quadratic Forms. JO - Elemente der Mathematik PY - 1973 SP - 141 EP - 146 VL - 28 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ELMA_1973__28_141125/ ID - ELMA_1973__28_141125 ER -