BibTeX
@INPROCEEDINGS{
         Villard1999Aai,
       author = "Dominique Villard and Michael B. Monagan",
       title = "ADrien: an implementation of automatic differentiation in Maple",
       booktitle = "ISSAC '99: Proceedings of the 1999 international symposium on Symbolic and
         algebraic computation",
       year = "1999",
       isbn = "1-58113-073-2",
       pages = "221--228",
       location = "Vancouver, British Columbia, Canada",
       doi = "http://doi.acm.org/10.1145/309831.309941",
       publisher = "ACM Press"
}