Dar QF, Padi TR, Tali AM. Mixed input and output orientations of Data Envelopment Analysis with Linear Fractional Programming and Least Distance Measures. Stat., optim. inf. comput. [Internet]. 2016Dec.7 [cited 2024Nov.22];4(4):326-41. Available from: http://iapress.org/index.php/soic/article/view/20161204