Lamboy, Geonela, José A. Dumas, Joaquín A. Chong, and Christian Rivera-Goyco. “Simple Method of Coffee-Shrub Biochar-Ozonolysis”. The Journal of Agriculture of the University of Puerto Rico 106, no. 1 (January 1, 2022): 91–108. Accessed May 10, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/21056.