Šadauskienė, Jolanta, Andrius Buska, Arūnas Burlingis, Raimondas Bliūdžius, and Albinas Gailius. 2009. “The Effect of Vertical Air Gaps to Thermal Transmittance of Horizontal Thermal Insulating Layer”. Journal of Civil Engineering and Management 15 (3):309-15. https://mla.vgtu.lt/index.php/JCEM/article/view/6436.