Boyce, D. S. “Processing Yield from Parchment Coffee Demucilaged Mechanically and by Natural Fermentation”. The Journal of Agriculture of the University of Puerto Rico 46, no. 4 (October 1, 1962): 334–341. Accessed March 29, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12353.