Pinzón, B., R. Montenegro, and E. Santamaría. “EFFECT OF THE REDUCTION OF THE OCUPATION PERIOD IN A BEEF CATTLE PRODUCTION SYSTEM BASED ON Brachiaria Decumbens CV. SEÑAL. GUALACA, PANAMA. 2001-2003.”. Ciencia Agropecuaria, no. 17, Oct. 2004, pp. 31-42, http://revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/324.