H. Grisales-Romero, N. Montealegre, J. G. Piñeros, D. Ospina, and E. Nieto, “Relationship between PM2.5 and Acute Respiratory Disease in a Colombian region: Generalized Additive Models”, Univ. Salud, vol. 24, no. 1, pp. 45–54, Dec. 2021.