Fiore, Maria Giulia, et al. “A Molecular Model of the Interaction Between Vitamin D Binding Protein-Derived Macrophage Activating Factor and Vitamin D Receptor”. Italian Journal of Anatomy and Embryology, vol. 118, no. 2, Jan. 2014, p. 89, https://oajournals.fupress.net/index.php/ijae/article/view/3661.