@inproceedings{ifl2005,
 author = {J. M. Siskind and
           B. A. Pearlmutter},
 title = {Perturbation Confusion and Referential Transparency: Correct
          Functional Implementation of Forward-Mode {AD}},
 booktitle = {Draft Proceedings of the International Workshop on
              Implementation and Application of Functional Languages (IFL)},
 location = {Dublin, Ireland},
 day = {19--21},
 month = sep,
 year = 2005,
 url = {http://engineering.purdue.edu/~qobi/papers/ifl2005.pdf}}