Sign-consistency and solvability of constrained linear systems. Lee, Gwang-Yeon; Shader, Bryan L. — 1998 ELA. The Electronic Journal of Linear Algebra [electronic only]
On coincidence and fixed-point theorems in symmetric spaces. Cho, Seong-Hoon; Lee, Gwang-Yeon; Bae, Jong-Sook — 2008 Fixed Point Theory and Applications [electronic only]