Andrés, Cristina, Blanca Luque, and María Josefa Díez. “Pollen Morphology of Cultivated Citric Species in Andalucia Occidental (Spain)”. Acta Botanica Malacitana 26 (December 1, 2001): 69–77. Accessed December 13, 2025. https://www.revistas.uma.es/index.php/abm/article/view/7400.