Lerner, Henrik. “Philosophical Roots of the One Medicine Movement: An Analysis of Some Relevant Ideas by Rudolf Virchow and Calvin Schwabe With Their Modern Implications”. Studia Philosophica Estonica 6, no. 2 (May 8, 2013): 97-109. Accessed June 2, 2020. https://ojs.utlib.ee/index.php/spe/article/view/spe.2013.6.2.07.