Thomas M. Cover and Joy A. Thomas, Elements of Information Theory (2nd ed.), John Wiley & Sons, Inc. (2006).

Sheri Edwards Thomas M. Cover and Joy A. Thomas, Elements of Information Theory (2nd ed.), John Wiley & Sons, Inc. (2006). 400-401 2008 44 Inf. Process. Manage. 1 http://dx.doi.org/10.1016/j.ipm.2007.02.009 db/journals/ipm/ipm44.html#Edwards08