Riesgo, L., Areal, F. J. and Rodríguez-Cerezo, E. (2012) “How can specific market demand for non-GM maize affect the profitability of Bt and conventional maize? A case study for the middle Ebro Valley, Spain”, Spanish Journal of Agricultural Research, 10(4), pp. 867-876. doi: 10.5424/sjar/2012104-448-11.