R. Imkesorn, W. H. HLuangdansakul, S. Prommas, A. Chotedelok, and T. Luangwilai, “Comparison Respiratory Distress Syndrome (RDS) Rate in Late Pre-term Infants between Gestational Age 34 Weeks and 35-36 Weeks”, Thai J Obstet Gynaecol, vol. 23, no. 1, pp. 18–24, Mar. 2015.