Efficient fitting of long-tailed data sets into hyperexponential distributions. - Alma Riska; Vesselin Diev; Evgenia Smirni (GLOBECOM, 2002)

Efficient fitting of long-tailed data sets into phase-type distributions. - Alma Riska; Vesselin Diev; Evgenia Smirni (SIGMETRICS Perform. Evaluation Rev., 2002)

An EM-based technique for approximating long-tailed data sets with PH distributions. - Alma Riska; Vesselin Diev; Evgenia Smirni (Perform. Evaluation, 2004)