1. Probability and Measure;Billingsley,1995
2. Bradley, R.C., 2002a. Introduction to Strong Mixing Conditions, Vol. 1. ClassPak Publishing, Indiana University, Bloomington.
3. On positive spectral density functions;Bradley;Bernoulli,2002
4. A criterion for a continuous spectral density;Bradley;J. Multivariate Anal.,2003
5. Stochastic Processes;Doob,1953