1. Annas G.J. (1999) “Waste and Longing – The Legal Status of Placental-Blood Banking.” New England Journal of Medicine 340: 1521–1524
2. Baaske K. (1991) Analogic Argument in Public Discourse: A Reconsideration of the Nature and Function of Analogy. In: van Eemeren F.H., Grootendurst R., Blair J.A., Willard C.A. (eds) Proceedings of the Second International Conference on Argument. Sic Sat, Amsterdam, pp. 411–415
3. Black M. (1962) Metaphors. In: Max Black (eds) Models and Metaphors: Studies in Language and Philosophy. Cornell University Press, Ithaca, pp. 19–43
4. Campbell N.R. (1920) Physics: The Element. Cambridge University Press, Cambridge
5. Childress J.F. “Metaphor and Analogy.” In: Encyclopedia of Bioethics, revised edition. Edited by Warren Thomas Reich. 1834–1843. New York: Simon and Schuster Macmillan, 2004.