Normative values for circadian and ultradian cardiovascular rhythms in childhood - Hadtstein, Charlotte; Wühl, Elke; Soergel, Marianne; Witte, Klaus; Schaefer, Franz (Hypertension, 2004)
Members of the German Study Group on Pediatric Hypertension are Marianne Soergel, Martin Kirschstein, Thomas Danne, Jutta Gellermann, Reinhard Holl, Friedrich Krull, Hagen Reichert, György S. Reusz, Wolfgang Rascher