1. S. Hales, Haemostaticks, in Statistical Essays II, Vol. 11, (Innings Manby, London, 1733)
2. www.britannica.com/EBchecked/topic/252340/Stephen-Hales
3. V. Blazek, New Insights in the phenomenon of distributed dermal perfusion rhythmicity using computer aided optoelectronic sensor measuring strategies. Acta Mech. Slovaca 14(2), 42–50 (2010)
4. V. Blazek, Biomedical Technology—2011 and beyond. Communications 1, 5–12 (2011)
5. K. Golenhofen, G. Hildebrandt, Die Beziehung des Blutdruckrhythmus zu Atmung und peripherer Durchblutung . Pflügers Archiv, Bd. 267 Nr 1, 27–45 (1958)