Measuring the Construction Efficiency of Zero-Waste City Clusters Based on an Undesirable Super-Efficiency Model and Kernel Density Estimation Method. - Xuhui Cong; Peikun Su; Liang Wang; Sai Wang; Zhipeng Qi; Jonas Saparauskas; Jaroslaw Górecki; Miroslaw J. Skibniewski (Syst., 2023)