Performance benchmarking of achievements in the Olympics: An application of Data Envelopment Analysis with restricted multipliers. - Kazuyuki Sekitani; Yu Zhao 049 (Eur. J. Oper. Res., 2021)

Least-distance approach for efficiency analysis: A framework for nonlinear DEA models. - Kazuyuki Sekitani; Yu Zhao 049 (Eur. J. Oper. Res., 2023)

Estimating Malmquist-type indices with StoNED. - Yu Zhao 049; Hiroshi Morita (Expert Syst. Appl., 2024)

Closest targets in Russell graph measure of strongly monotonic efficiency for an extended facet production possibility set. - Kazuyuki Sekitani; Yu Zhao 049 (J. Oper. Res. Soc., 2025)

Hierarchical conditional forests for meta-frontier analysis under input uncertainty. - Yu Zhao 049 (Array, 2026)