Deller SC and CH Nelson (1990). “Nonparametric Efficiency Measurement – Using Complementary Information from Radial and Nonradial Measures.” American J Agricultural Economics 7: 1345-1345.
Deller SC and CH Nelson (1990). “Nonparametric Efficiency Measurement – Using Complementary Information from Radial and Nonradial Measures.” American J Agricultural Economics 7: 1345-1345.