1. Merriam-Webster Online Dictionary. http://www.m-w.com
2. Oxford English Dictionary. http://dictionary.oed.com
3. Anonymous Author: A calculation of the credibility of human testimony. Philosophical Transactions of the Royal Society 21, 359–365 (1699)
4. Barnett, J.A.: Computational methods for a mathematical theory of evidence. In: P.J. Hayes (ed.) IJCAI’81, 7th International Joint Conference on Artificial Intelligence, pp. 868–875. Vancouver, Canada (1981)
5. Bernoulli, J.: Ars Conjectandi. Thurnisiorum, Basel (1713)