همگرایی گرانشی: تفاوت میان نسخه‌ها

* "''[httphttps://web.archive.org/web/20070929124804/http://www.btinternet.com/~Boughen/G-LenS G-LenS]''". A Point Mass Gravitational Lens Simulation, Mark Boughen.

* Newbury, Pete, "''[https://web.archive.org/web/20110523100723/http://www.iam.ubc.ca/old_pages/newbury/lenses/lenses.html Gravitational Lensing]''". Institute of Applied Mathematics, The University of British Columbia.