Kalis, H., and I. Kangro. “SIMPLE METHODS OF ENGINEERING CALCULATION FOR SOLVING STATIONARY 2 –D HEAT TRANSFER PROBLEMS IN MULTILAYER MEDIA”.
ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 26, 2006): 359–366. Accessed April 6, 2025.
https://journals23.rta.lv/index.php/ETR/article/view/1991.