If you use Sage in a book, paper, website, etc., please email
William Stein and reference Sage as follows:
William Stein, Sage Mathematics Software (Version x.y.z),
The Sage Group, 2008, http://www.sagemath.org/
where you should change x.y.z. to the version of Sage that you used for the paper. In Bibtex:
@manual{sage,
Key = {Sage},
Author = {William Stein},
Organization = {The Sage~Group},
Title = {{Sage}: {O}pen {S}ource {M}athematical {S}oftware ({V}ersion x.y.z)},
note = {{\tt http://www.sagemath.org}},
Year = 2008}
Or,
\bibitem[Sage]{sage} Stein, William,
\emph{Sage: {O}pen {S}ource {M}athematical {S}oftware ({V}ersion x.y.z)},
The Sage~Group, 2008,
{\tt http://www.sagemath.org}.
Also, be sure to find out what components of Sage, e.g., Numpy, PARI, GAP, that your calculation
uses, and properly attribute those systems (for example, ask on sage-support). Similarly,
consider finding out who wrote the Sage code you're using and acknowledge them explicitly as
well.