1. On pyrheliometric measurements;Ångström;Tellus,1958
2. Bossy, L. & Pastiels, R. 1948. Étude des propriétés fondamentales des actinometres. Mémoires, IRMB, 29.
3. Fröhlich, C. 1972. Standards for meteorological radiation measurements. Second Symposium on Meteorological Observations and Instrumentation, San Diego, March 27-30.
4. Sensitivity distribution along sensors of compensation pyrheliometers (in Russian);Klevantsova;TRUDY of Main Geophysical Observatory Leningrad,1969
5. Distribution of sensitivity on the sensor of pyrheliometers;Major;Idöjárás,1968