Jahanshahloo GR, RK Matin and AH Vencheh (2004). “On FDH Efficiency Analysis with Interval Data.” Appl Math Comput 159(1): 47-55.
Jahanshahloo GR, RK Matin and AH Vencheh (2004). “On FDH Efficiency Analysis with Interval Data.” Appl Math Comput 159(1): 47-55.