%0 Journal Article %A M. Allahyar %A M. Rostamy-Malkhalifeh %T An Improved Approach for Estimating Returns to Scale in DEA %J Bulletin of the Malaysian Mathematical Society %D 2014 %V 37 %N 4 %U http://geodesic.mathdoc.fr/item/BMMS_2014_37_4_a23/ %F BMMS_2014_37_4_a23