Vélez-Colón, Rubén, and Stephen A. Garrison. “Growth, Maturity and Flowering of Pigeon Peas, Cajanus Cajan L. Millsp., at High Latitudes”. The Journal of Agriculture of the University of Puerto Rico 73, no. 3 (July 1, 1989): 223–229. Accessed April 19, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6460.