@article{BMMS_2014_37_4_a23,
     author = {M. Allahyar and M. Rostamy-Malkhalifeh},
     title = {An {Improved} {Approach} for {Estimating} {Returns} to {Scale} in {DEA}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2014},
     volume = {37},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2014_37_4_a23/}
}