DEA-based internal validity index for clustering. - Jing Zhao 026; Qingxian An (J. Oper. Res. Soc., 2025)

Weight space clustering method: Integrating data envelopment analysis with Monte Carlo simulation. - Jing Zhao 026; Qingxian An; Ali Emrouznejad; Ren Mu (Comput. Oper. Res., 2026)

Centroid cross-efficiency approach for clustering. - Qingxian An; Jing Zhao 026; Ya Chen 001; Haoxun Chen (Eur. J. Oper. Res., 2026)

Data envelopment analysis clustering: an optimization based machine learning. - Qingxian An; Jing Zhao 026; Joe Zhu (J. Oper. Res. Soc., 2026)