Enrique Pérez, J., and J. Adsuar. “Antigenic Relationship Between Puerto Rican Pepper-Mosaic Virus and a Strain of Potato Virus Y”. The Journal of Agriculture of the University of Puerto Rico 39, no. 3 (July 1, 1955): 165–167. Accessed April 20, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12678.