I suggest
Maxima.sourceforge.net. Maxima, a Computer Algebra System. Version 5.18.1
(2009). http://maxima.sourceforge.net/
It might be useful to note that there are numerous references to the closely-related Macsyma (much easier to find by internet search because, unlike "maxima" the name is not a common noun). Macsyma, historically, dates to the late 1960's with the earliest published paper in 1971 by Martin and Fateman.
I looked at the wikipedia article for possible alternatives. I did not see anything useful there.
RJF
Leo Butler wrote:
> On Thu, 23 Apr 2009, Robert Dodier wrote:
>
> < On 4/23/09, Leo Butler <l.butler at ed.ac.uk> wrote:
> <
> < > The Maxima Group. Maxima, a Computer Algebra System. Version 5.18.1
> < > (2009). http://maxima.sourceforge.net/
> <
> < Well, there is no "Maxima Group" so I wouldn't try to pretend there is
> < just for the sake of trying to standardize the reference ...
> < Attributing authorship to "A multitude" would be more accurate, at least.
>
> There clearly is a set of people who maintain and develop Maxima.
> I do not know if this set has an associative binary operation (or who is 1),
> so I abuse terminology somewhat and elevate this set to a group. ;-)
>
> --------
> My thanks to the developers for there work. Leo
>
>