Hussain, Amna, et al. “Clinical Presentation Of Gastroesophageal Reflux Among Children With Chronic Constipation: Gastroesophageal Reflux Among Children With Chronic Constipation”. Pakistan BioMedical Journal, vol. 5, no. 6, June 2022, pp. 38-41, https://doi.org/10.54393/pbmj.v5i6.520.