Chang KP (1997). “Note on `a Discussion of Testing DMUs’ Return to Scale’ by Zhu and Shen in European-J Operational Research 81 -1995 Page 590-596.” EJOR 97(3): 597-599.

Chang KP (1997). “Note on `a Discussion of Testing DMUs’ Return to Scale’ by Zhu and Shen in European-J Operational Research 81 -1995 Page 590-596.” EJOR 97(3): 597-599.

Leave a Reply