title: Scale-invariant aspects of cardiac dynamics. Observing sleep stages and circadian phases.
authors.affiliation: Center for Polymer Studies, Department of Physics, Boston University, Massachusetts 02215, USA. plamen@buphy.bu.edu
authors.forename: Plamen Ch
authors.initials: PCh
authors.lastname: Ivanov
mesh_terms: D000818:Animals; D001683:Biological Clocks / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D012894:Sleep Stages / Q000502:physiology*