1.
Fallas G, Chacón M, Castro J. Sustainability of agricultural systems on ecological and conventional farms in Costa Rica. UNED Res. J. [Internet]. 2009 Dec. 1 [cited 2026 Mar. 24];1(2):151-6. Available from: https://revistas.uned.ac.cr/index.php/cuadernos/article/view/228