@article{Aigner1976,
author = {Aigner, D.J. and Amemiya, T. and Poirier, D.J.},
title= {On the estimation of production frontiers: maximum likelihood estimation of the parameters of a discontinuous density function},
year = {1976},
doi = {10.2307/2525708},
journal = {International Economic Review},
volume = {17},
number = {2},
pages = {377--396},
}