Steck, Daniel J. (2009). „Pre- and Post-Market Measurements of Gamma Radiation and Radon Emanation from a Large Sample of Decorative Granites”. Nineteenth International Radon Symposium(PDF). стр. 28—51. Архивирано из оригинала(PDF) 29. 11. 2015. г. Приступљено 25. 02. 2019.
Kumagai, Naoichi; Sadao Sasajima; Hidebumi Ito (1978). „Long-term Creep of Rocks: Results with Large Specimens Obtained in about 20 Years and Those with Small Specimens in about 3 Years”. Journal of the Society of Materials Science (Japan). 27 (293): 157—161. doi:10.2472/jsms.27.155.
Steck, Daniel J. (2009). „Pre- and Post-Market Measurements of Gamma Radiation and Radon Emanation from a Large Sample of Decorative Granites”. Nineteenth International Radon Symposium(PDF). стр. 28—51. Архивирано из оригинала(PDF) 29. 11. 2015. г. Приступљено 25. 02. 2019.