6Charnes A, Cooper WW, Rhodes E(1978). Measuring efficiency of decision making units. European Journal of Operational Research, 1978,2:429.
7Sherman HD. (1984)Hospital efficiency measurement and evaluation. Medical Care, 1984,10:929-935.
8Shepard DS, Hodgkin D, Anthony YE. Analysis of hospital costs: a manual for managers. Geneva, Switzerland. World Health Organization. 2000(ISBN 92 4 1545283).