Farhan, Syed Ahmad; Ismail, Fouad Ismail; Kiwan, Osamah; Shafiq, Nasir; Zain-Ahmed, Azni; Husna, Nadzhratul; Hamid, Afif Izwan Abd (2021). „Effect of Roof Tile Colour on Heat Conduction Transfer, Roof-Top Surface Temperature and Cooling Load in Modern Residential Buildings under the Tropical Climate of Malaysia”. Sustainability. 13 (9): 4665. doi:10.3390/su13094665.
„2018 INTERNATIONAL BUILDING CODE (IBC) - CHAPTER 15”. International Code Council. Приступљено 29. 3. 2021. „1507.2.2 Slope. asphalt shingles shall only be use on roof slopes of two units vertical in 12 units horizontal (17-percent slope) or greater.”CS1 одржавање: Формат датума (веза)