O'Hara GJ, Phillips DBMethod and apparatus for measuring internal body temperature utilizing infrared emission. U.S. Patent Nrs. 4602642, 1986 and 4790324, 1988.
2.
Fraden J.Infrared electronic thermometer and method for measuring temperature . U.S. Patent Nr. 4797840, 1989.
3.
Fraden J.Non-contact temperature measurements in medicine. In: Bioinstrumentation and biosensors. Marcel Dekker, Inc. , 1991; Chapt. 17: 511-49.
