Silvia, L., S. Nistri, C. Sassoli, and D. Bani. “Relaxin, Cardiac Stem Cells and Heart Regeneration”. Italian Journal of Anatomy and Embryology, vol. 118, no. 1, Jan. 2014, pp. 77-79, https://oajournals.fupress.net/index.php/ijae/article/view/3279.