Imran, R. S., R. Resmawan, N. Achmad, and A. R. Nuha. “SEIPR-Mathematical Model of the Pneumonia Spreading in Toddlers With Immunization and Treatment Effects”. Jurnal Matematika, Statistika Dan Komputasi, vol. 17, no. 2, Dec. 2020, pp. 202-18, doi:10.20956/jmsk.v17i2.11166.