"Chapter 4. Effects of Oil Shale Technologies"(PDF). Proposed Oil Shale and Tar Sands Resource Management Plan Amendments to Address Land Use Allocations in Colorado, Utah, and Wyoming and Final Programmatic Environmental Impact Statement. Bureau of Land Management. September 2008. pp. 4‑3. FES 08-32. Archived from the original(PDF) on 27 May 2010. Retrieved 7 August 2010.
Al-Harahsheh, Adnan; Al-Otoom, Awni Y.; Shawabkeh, Reyad A. (16 October 2003). "Sulfur distribution in the oil fractions obtained by thermal cracking of Jordanian El-Lajjun oil Shale". Energy. 30 (15) (published November 2005): 2784–2795. doi:10.1016/j.energy.2005.01.013.
Tiikma, Laine; Johannes, Ille; Luik, Hans (March 2006). "Fixation of chlorine evolved in pyrolysis of PVC waste by Estonian oil shales". Journal of Analytical and Applied Pyrolysis. 75 (2): 205–210. doi:10.1016/j.jaap.2005.06.001.
Energy Security of Estonia(PDF) (Report). Estonian Foreign Policy Institute. September 2006. Archived from the original(PDF) on 8 January 2012. Retrieved 20 October 2007.
Alali, Jamal; Abu Salah, Abdelfattah; Yasin, Suha M.; Al Omari, Wasfi (2006). Oil Shale in Jordan(PDF) (Report). Natural Resources Authority of Jordan. Retrieved 11 June 2017.
Dyni, John R. (1 April 1983). "Distribution and origin of sulfur in Colorado oil shale". 16th Oil Shale Symposium Proceedings. U.S. Geological Survey: 144–159. OSTI5232531. CONF-830434-.
Qian, Jialin; Wang, Jianqiu (7 November 2006). World oil shale retorting technologies(PDF). International Conference on Oil Shale: Recent Trends In Oil Shale. Amman, Jordan. Archived from the original(PDF) on 27 May 2008. Retrieved 29 June 2007.
Allix, Pierre; Burnham, Alan K. (1 December 2010). "Coaxing Oil from Shale". Oilfield Review. 22 (4). Schlumberger: 6. Archived from the original(PDF) on 6 January 2015. Retrieved 18 April 2012.
Beger, Mariliis, ed. (2017). Estonian Oil Shale Industry. Yearbook 2016(PDF). Eesti Energia, VKG, KKT, Tallinn University of Technology. p. 18. Retrieved 29 January 2018.
web.archive.org
Energy Security of Estonia(PDF) (Report). Estonian Foreign Policy Institute. September 2006. Archived from the original(PDF) on 8 January 2012. Retrieved 20 October 2007.
Allix, Pierre; Burnham, Alan K. (1 December 2010). "Coaxing Oil from Shale". Oilfield Review. 22 (4). Schlumberger: 6. Archived from the original(PDF) on 6 January 2015. Retrieved 18 April 2012.
Qian, Jialin; Wang, Jianqiu (7 November 2006). World oil shale retorting technologies(PDF). International Conference on Oil Shale: Recent Trends In Oil Shale. Amman, Jordan. Archived from the original(PDF) on 27 May 2008. Retrieved 29 June 2007.
Bartis, Jim (26 October 2006). Unconventional Liquid Fuels Overview(PDF). World Oil Conference. Association for the Study of Peak Oil & Gas – USA. Archived from the original on 21 July 2011. Retrieved 28 June 2007.
"Chapter 4. Effects of Oil Shale Technologies"(PDF). Proposed Oil Shale and Tar Sands Resource Management Plan Amendments to Address Land Use Allocations in Colorado, Utah, and Wyoming and Final Programmatic Environmental Impact Statement. Bureau of Land Management. September 2008. pp. 4‑3. FES 08-32. Archived from the original(PDF) on 27 May 2010. Retrieved 7 August 2010.