[2]
Linked-cone DEA profit ratios and technical efficiency with application to Illinois coal mines[J] . Russell G Thompson,P.S Dharmapala,Robert M Thrall.International Journal of Production Economics . 1995 (1)
[2]
Linked-cone DEA profit ratios and technical efficiency with application to Illinois coal mines[J] . Russell G Thompson,P.S Dharmapala,Robert M Thrall.International Journal of Production Economics . 1995 (1)