1. Wood, R. C.: The Infrared Hygrometer — Its Application to Difficult Humidity Measurement Problems. Ch. 48 in: Wexler, A. (Ed.): Humidity and Moisture, Vol. I. New York: Reinhold Publ. Comp., 1965.
2. Sheriff, D. W.: An Infra-Red Psychrometer for Detecting Changes in the Humidity of Leaf Boundary Layers. J. exp. Bot.,24, 641–647 (1973).
3. Kobayashi, J.: Investigations on Hygrometry. Papers Meteorol. Geophys. Tokyo,11, 213–338 (1960).
4. Francisco, C. C., and D. J. Beaubien: An Automatic Dew-Point Hygrometer with Thermoelectric Cooling. Ch. 17 in: A. Wexler (Ed.): Humidity and Moisture, Vol. I. New York, 1965.
5. Friesen, J., and F. Reece: Relative Humidity Control in Environmental Chambers. Trans. ASAE,16, 968–969 (1973).