Tulkens H and P Vandeneeckaut (1995). “Non-Frontier Measures of Efficiency, Progress and Regress for Time – Series Data.” Int J Prod Econ 3: 83-97.
Tulkens H and P Vandeneeckaut (1995). “Non-Frontier Measures of Efficiency, Progress and Regress for Time – Series Data.” Int J Prod Econ 3: 83-97.