Strong duality in minimizing a quadratic form subject to two homogeneous quadratic inequalities over the unit sphere. - Van-Bong Nguyen; Thi Ngan Nguyen; Ruey-Lin Sheu (J. Glob. Optim., 2020)

Simultaneous Diagonalization via Congruence of Hermitian Matrices: Some Equivalent Conditions and a Numerical Solution. - Thanh Hieu Le; Thi Ngan Nguyen (SIAM J. Matrix Anal. Appl., 2022)