Campos, E., H. Bolaños, J. Serra, J. A. Ramírez, O. Barboza, and E. Jacobs. “<i>Mycoplasma pneumoniae</i> Infections in School Children of a Tropical Community”. Revista De Biología Tropical, vol. 41, no. 3A, Dec. 1993, pp. 371–377, https://revistas.ucr.ac.cr/index.php/rbt/article/view/23381.