@article{GDZPPN002028425,
title = {A Simple Proof of the Convexity of the Field of Values Defined by Two Hermitian Forms.},
journal = {Aequationes mathematicae},
volume = {13},
year = {1975},
pages = {82-83},
zbl = {0307.15009},
url = {http://dml.mathdoc.fr/item/GDZPPN002028425}
}
Au-Yeung, Yik-Hoi. A Simple Proof of the Convexity of the Field of Values Defined by Two Hermitian Forms.. Aequationes mathematicae, Tome 13 (1975) pp. 82-83. http://gdmltest.u-ga.fr/item/GDZPPN002028425/