Tohidi G, GR Jahanshahloo, FH Lotfi, N Shoja and S Razavyan (2005). “Undesirable Inputs and Outputs in DEA Models.” Appl Math Comput 169(2): 917-925.
Tohidi G, GR Jahanshahloo, FH Lotfi, N Shoja and S Razavyan (2005). “Undesirable Inputs and Outputs in DEA Models.” Appl Math Comput 169(2): 917-925.