J Electrocardiol 1988 Apr;21(2):121-36.
Electrocardiographic body surface potential maps of the QRS and T of
normal young men. Qualitative description and selected quantifications.
Widman LE, Liebman J, Thomas C, Fraenkel R, Rudy Y,
Department of Medicine (University Hospitals), Case Western Reserve
University, San Antonio.
Pol Arch Med Wewn 1992 Aug-Sep;88(2-3):127-40.
[Heart potential mapping from the thoracic surface in healthy persons]
Kalka D,
Katedra i Zaklad Patofizjologii AM, Wroclawiu.