H. Asyiroh, R. A. Setyoningrum, W. Fatmaningrum, and B. Utomo, “Risk Factors of Recurrent Upper Respiratory Tract Infection in Children Aged 3-60 Months at Primary Healthcare Centers (Puskemas) in Gresik”, JR, vol. 7, no. 1, pp. 8–13, Jan. 2021.