Tavares, F. C., Beer, J., Jiménez Otárola, F., Schroth, G., & Fonseca, C. (1999). Costa Rican farmers' experience with the introduction of timber trees in their coffee plantations.

Tavares, Fernanda C., John Beer, Francisco Jiménez Otárola, Götz Schroth, ja Carlos Fonseca. Costa Rican Farmers' Experience With the Introduction of Timber Trees in Their Coffee Plantations. 1999.

Tavares, Fernanda C., et al. Costa Rican Farmers' Experience With the Introduction of Timber Trees in Their Coffee Plantations. 1999.