Grifell-Tatje E and CAK Lovell (1997). “A DEA-Based Analysis of Productivity Change and Intertemporal Managerial Performance.” Ann Oper Res 73: 177-189.
Grifell-Tatje E and CAK Lovell (1997). “A DEA-Based Analysis of Productivity Change and Intertemporal Managerial Performance.” Ann Oper Res 73: 177-189.