Schnabel, F., de Melo Virginio Filho, E., Xu, S., Fisk, I. D., Roupsard, O., & Haggar, J. (2018). Shade trees: a determinant to the relative success of organic versus conventional coffee production. Agroforestry Systems, 92(6), 1535-1549. https://doi.org/10.1007/s10457-017-0100-y