Aigner D., Lovell K. C. A. & Schmidt P.Formulation and estimation of stochastic frontier production finction models. : .
Aigner D.J, Lovell Knox C A and Schmidt Peter.Formulation and estimation of stochastic frontier production finction models. : .
Aigner D., Lovell K. C. A. and Schmidt P.Formulation and estimation of stochastic frontier production finction models. : .
Aigner D.J, Lovell Knox C A and Schmidt Peter.: . .