Ramadan, O., H. Rashad, M. Darwish, and S. Dabash. “Effect of Non-Aspirated Gastric Residual Content on Preterm infants’ Health Status”. International Journal of Health Sciences, vol. 6, no. S1, May 2022, pp. 6875-87, doi:10.53730/ijhs.v6nS1.6830.