You are free to do whatever you like with this software,
provided that, if you do use it, then you reference it.

The correct paper references are
Swanson M E C, Tegmark M, Hamilton A J S, and Hill J C (2007)
"Methods for Rapidly Processing Angular Masks of Next-Generation Galaxy Surveys"(arXiv:0711.4352) http://arxiv.org/abs/0711.4352

and

Hamilton A J S & Tegmark M (2004)
"A scheme to deal accurately and efficiently with complex angular masks
in galaxy surveys", MNRAS, 349, 115-128.
(astro-ph/0306324) http://arXiv.org/abs/astro-ph/0306324

The correct web reference is
http://space.mit.edu/home/tegmark/mangle/

Updated by mecs 28 Nov 2007