“DETERMINATION OF THE ECONOMIC AND PHYSIC OPTIMAL NITROGEN RATES FOR THE CORN CROP WITH THREE RESPONSE MODEL, AZUERO, PANAMA, 2000-2002”. 2004. Ciencia Agropecuaria, no. 15 (February): 1-16. https://idiap.desarrollo-ojs1.metadatos.org/index.php/ciencia-agropecuaria/article/view/208.