Emmanuel Perrin Rachid Harba C. Berzin-Joseph Ileana Iribarren A. Bonami nth-order fractional Brownian motion and fractional Gaussian noises. 1049-1059 2001 49 IEEE Trans. Signal Process. 5 https://doi.org/10.1109/78.917808 db/journals/tsp/tsp49.html#PerrinHBIB01