Structural relationships between measures based on heart beat intervals: potential for improved risk assessment. - Alfred P. Hallstrom; Phyllis K. Stein; Raphael Schneider; Morrison Hodges; Georg Schmidt; Kurt Ulm (IEEE Trans. Biomed. Eng., 2004)

Association between Short Term and Long Term Communication in Pathological Autonomic Control. - Dirk Hoyer; Birgit Frank; Ch. Gotze; Rafal Baranowski; Jan J. Zebrowski; Montserrat Vallverdú; M. Palacios; Pere Caminal; Antoni Bayés de Luna; Phyllis K. Stein; Georg Schmidt; Hendrik Schmidt (EMBC, 2006)

Circadian and Ultradian Rhythms in Cardiac Autonomic Modulation. - Phyllis K. Stein; Eric J. Lundequam; Daniel J. Clauw; Kenneth E. Freedland; Robert M. Carney; Peter P. Domitrovich (EMBC, 2006)

Stratification Pattern of Static and Scale-Invariant Dynamic Measures of Heartbeat Fluctuations Across Sleep Stages in Young and Elderly. - Daniel T. Schmitt 002; Phyllis K. Stein; Plamen Ch. Ivanov (IEEE Trans. Biomed. Eng., 2009)

Time Frequency Analysis of Heart Rate Variability with Chaos Theory. - Hoang ChuDuc; Phyllis K. Stein (ICCSA (6), 2013)

The Effect of Threshold Values and Weighting Factors on the Association between Entropy Measures and Mortality after Myocardial Infarction in the Cardiac Arrhythmia Suppression Trial (CAST). - Christopher C. Mayer; Martin Bachler; Andreas Holzinger; Phyllis K. Stein; Siegfried Wassertheurer (Entropy, 2016)

A Hidden Markov Model for Seismocardiography. - Johan Wahlström; Isaac Skog; Peter Handel; Farzad Khosrow-Khavar; Kouhyar Tavakolian; Phyllis K. Stein; Arye Nehorai (IEEE Trans. Biomed. Eng., 2017)