Liberato, Selma, Gurmeet Singh, and Kim Mulholland. “Effects of Protein Energy Supplementation During Pregnancy on Fetal Growth: A Review of the Literature Focusing on Contextual Factors”. Food & Nutrition Research00 (November 12, 2013). Accessed September 24, 2020. https://foodandnutritionresearch.net/index.php/fnr/article/view/516.