On VEA, production trade-offs and weights restrictions. - Panagiotis Ravanos; Giannis Karagiannis (J. Oper. Res. Soc., 2023)

On value efficiency analysis and targeted benevolence cross efficiency. - Panagiotis Ravanos; Giannis Karagiannis (J. Oper. Res. Soc., 2024)

Inverted VEA for worst-practice benchmarking: with an application to distress prediction of European banks. - Panagiotis Ravanos; Stavros A. Kourtzidis; Giannis Karagiannis (Ann. Oper. Res., 2025)