Brilliantov, Nikolai V., and Thorsten Pöschel. "Coefficient Of Restitution." Kinetic Theory of Granular Gases. : Oxford University Press, 2004-07-01. Oxford Scholarship Online. 2010-01-01. Date Accessed 20 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530381.001.0001/acprof-9780198530381-chapter-3>.
Brilliantov, N., & Pöschel, T.(2004-07-01). Coefficient Of Restitution. In Kinetic Theory of Granular Gases. : Oxford University Press. Retrieved 20 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530381.001.0001/acprof-9780198530381-chapter-3.
Brilliantov, Nikolai V., and Thorsten Pöschel. "Coefficient Of Restitution." In Kinetic Theory of Granular Gases. : Oxford University Press, 2004-07-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530381.001.0001/acprof-9780198530381-chapter-3.
Brilliantov NV, Pöschel T. Coefficient Of Restitution. In: Brilliantov NV, Pöschel T. Kinetic Theory of Granular Gases. Oxford University Press; 2004. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530381.001.0001/acprof-9780198530381-chapter-3. Accessed May 20, 2013.