Mixture trees - hierarchically tied mixture densities for modeling HMM emission probabilities. - J. Fritsch (EUROSPEECH, 1999)

The Network Maturity Model for Internet Development. - Sourav Bhattacharya; Jeffrey M. Capone; Kevin J. Dooley; Srihari Palangala; H.-S. Yang; W. Baumann; J. Fritsch (Computer, 1999)