Sánchez-Rodríguez, Héctor L., and Katherine Domenech-Pérez. “Light Sensors Assess Solar Radiation Vs. Shade Exposure of Slick- and Wild-Type Puerto Rican Holstein Cows”. The Journal of Agriculture of the University of Puerto Rico 105, no. 1 (January 1, 2021): 39–48. Accessed April 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/19634.