I. Camacho, E. Caeiro, C. Nunes, and M. Morais-Almeida, “Airborne pollen calendar of Portugal: a 15-year survey (2002-2017)”, Allergol Immunopathol, vol. 48, no. 2, pp. 194–201, Mar. 2020, Accessed: Sep. 11, 2025. [Online]. Available: https://all-imm.com/index.php/aei/article/view/232