RT Journal T1 Efficiency measurement for mixed two-stage nonhomogeneous network processes with shared extra intermediate resources A1 Qingxian AN, Xuyang LIU, Shijie DING PB Front. Eng FD 2020-06-15 YR 2020 JF Frontiers of Engineering Management JO Front. Eng VO 7 IS 2 SP 259 DO 10.1007/s42524-019-0080-x K1 shared resource allocation;mixed two-stage system;data envelopment analysis;efficiency LK {https://journal.hep.com.cn/fem/EN/article/article_26439.shtml}