Öhman, S.G. and Sandberg, C. 2014. Development of an Observational Instrument to Assess Gastro-Esophageal Reflux Disease in Premature Infants. International Journal of Child Health and Nutrition. 3, 2 (May 2014), 84–92. DOI:https://doi.org/10.6000/1929-4247.2014.03.02.3.