Reversible Data Hiding Based on Two-level HDWT Coefficient Histograms - Xu-Ren Luo; Chen-Hui Jerry Lin; Te-Lung Yin (CoRR, 2011)

A Detailed Examination of Sphicas (2014), Generalized EOQ Formula Using a New Parameter: Coefficient of Backorder Attractiveness. - Xu-Ren Luo (Symmetry, 2019)