Published in: IFPRI Discussion Paper ; 01318

Published in: Irrigation and Drainage, 62 (2013) 2, Seite 208-220

Published in: Outlook on Agriculture, 32 (2003) 3, Seite 183-190

Published in: Outlook on Agriculture, 30 (2001) 3, Seite 213-218

Published in: Revista Galega de Economía, 23 (2015) 4

Published in: Sustainable Agriculture Research, 2 (2013) 3, Seite 136

Published in: SSRN Electronic Journal (2014)

Published in: Japanese Journal of Medical Science and Biology, 50 (1997) 2, Seite 73-77