Huang X, Wang Y, Dai X, Luo JX, Chen J. Evaluation of port efficiency in Shanghai Port and Busan Port based on three-stage DEA model with environmental concerns. Transport [Internet]. 2020Dec.11 [cited 2024Nov.25];35(5):454-61. Available from: https://jeelm.vgtu.lt/index.php/Transport/article/view/11465