1. Benford, F.: The law of anomalous numbers. Proc. Am. Philos. Soc. 78, 551–572 (1938)
2. Berger, A., Hill, T.P.: An Introduction to Benford’s Law. Princeton Univerity Press, Princeton (2015)
3. Berger, A., Hill, T.P., Rogers, E.: Benford Online Bibliography (2009). http://www.benfordonline.net. (Last accessed 12 June 2020)
4. Candeloro, D.: Some remarks on the first digit problem, Atti Seminario Mat. e Fis. Univ. Modena, vol. XLVI, pp. 511–532 (1998)
5. Hill, T.P.: The significant-digit problem. Am. Math. Mon. 102, 322–327 (1995)