A new method for analysis of heart rate variability: counting statistics of 1/f fluctuations. - Malte Meesmann; Ferdinand Grüneis; Peter Flachenecker; Klaus-Dietrich Kniffki (Biol. Cybern., 1993)

General relation between variance-time curve and power spectral density for point processes exhibiting 1/fbeta-fluctuations, with special reference to heart rate variability. - Rainer Scharf; Malte Meesmann; Jan Boese; Dante R. Chialvo; Klaus-Dietrich Kniffki (Biol. Cybern., 1995)