Equations of Motion in General Relativity. : Oxford University Press, 2010-12-01. Oxford Scholarship Online. 2011-01-01. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199584109.001.0001/acprof-9780199584109>.
(2010-12-01). Equations of Motion in General Relativity. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199584109.001.0001/acprof-9780199584109.
Equations of Motion in General Relativity. : Oxford University Press, 2010-12-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199584109.001.0001/acprof-9780199584109.
Asada H, Futamase T, Hogan P. Equations of Motion in General Relativity. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199584109.001.0001/acprof-9780199584109. Accessed June 19, 2013.