1. Regional productivity of Spanish agriculture in a panel DEA framework;Aldaz;Appl. Econ. Lett.,2003
2. Economic versus environmental improvement potentials of Danish pig farms;Asmild;Agric. Econ.,2006
3. some models for estimating technical and scale inefficiencies in Data Envelopment Analysis;Banker;Eur. J. Oper. Res.,1984
4. Irrigation management: current and prospective issues;Biere,1983
5. Bossert, W., 2002. Manager, Groundwater Management District #4, Colby, Kansas, personal correspondence.