1. Observation on the finger volume pulse recorded photoelectrically;Hertzman;Am. J. Physiol.,1937
2. Measurement of regional circulation by the local clearance of radioactive sodium;Kety;Am. Heart J.,1949
3. Measurement of cutaneous blood flow by freely diffusible radioactive isotopes. Methodological studies on the washout of krypton-85 and xenon-13 from the cutaneous tissue in man;Sejrsen;Dan. Med. Bull.,1971