1. Brown R. W. (1970). “Measurement of water potential with thermocouple psychrometers: Construction and applications.” Res. Paper INT-80 U.S.D.A. Forest Service.
2. Kirkham D. and Powers W. L. (1972). Advanced Soil Physics . Wiley-Interscience New York N.Y.
3. Nilson L. O. (1980). “Hygroscopic moisture in concrete-drying measurements and related material properties.” Div. of Build. Mat. Res. Rep. TVBM-1003 Inst. of Technol. of Lund Lund Sweden.
4. Pihlajavaara S. E. (1982). “Estimation of drying of concrete at different relative humidities and temperature of ambient air with special discussion about fundimental feature of drying and shrinkage.” Creep and shrinkage in concrete structures Z. P. Bažant and F. H. Wittmann eds. John Wiley & Sons Ltd. New York N.Y. 87–107.