Yan Shuang Zhang and Taehan Lee and Byung Ho Jeong, A Dual Model for Efficiency Evaluation Considering Time Lag Effect. journal = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2013, vol. 79(7). 1579 - 1582 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/16498.