Statistical analysis of the soft constrained initialization of recursive least squares algorithms. - Nancy E. Hubing; S. Thomas Alexander (ICASSP, 1990)

Inverse invariant distributions. - Nancy E. Hubing; S. Thomas Alexander (IEEE Trans. Acoust. Speech Signal Process., 1990)

Statistical analysis of initialization methods for RLS adaptive filters. - Nancy E. Hubing; S. Thomas Alexander (IEEE Trans. Signal Process., 1991)