A. G. Lisi (2007-11-13). "A Connection With Everything". International Loop Quantum Gravity Seminar. Archived from the original on 22 May 2008. Retrieved 2008-06-15.
A. G. Lisi (2007-11-13). "A Connection With Everything". International Loop Quantum Gravity Seminar. Archived from the original on 22 May 2008. Retrieved 2008-06-15.