Dudziak, W., & Uklejewski, R. (1991). Heat and Moisture Transfer in a Two-Layer Building Wall at Slow Harmonic Changes of Thermo-Humiditive Environment Parameters Based on The theory of Thermodiffusion in Solids. Engineering Transactions, 39(1), 3-30. http://et.ippt.gov.pl/index.php/et/article/view/1611