G. Heal, Walker, B., Levin, S., Arrow, K., Dasgupta, P., Daily, G., Ehrlich, P., Maler, K. G., Kautsky, N., Lubchenco, J., Schneider, S., and Starrett, D.,
“Genetic diversity and interdependent crop choices in agriculture”,
Resource and Energy Economics, vol. 26, pp. 175-184, 2004.