Rika, I., I. Budiman, J. Kurniarobbi, and N. Mahmud. “Prevalence of Exercise-Induced Bronchospasm by Laboratory Exercise Challenge Among Ragunan Sport School Athletes”. Medical Journal of Indonesia, Vol. 17, no. 1, Feb. 2008, pp. 33-6, doi:10.13181/mji.v17i1.297.