Measurement and simulation of solar radiation availability in relation to the growth of coffe plants in an agroforestry sysem with rubber trees - Righi, Ciro Abbud; Bernardes, Marcos Silveira; Lunz, Aureny Maria Pereira; Pereira, Carlos Rodrigues; Dourado Neto, Durval; Favarin, José Laércio (Revista Árvore, 2007)