@techreport{tr-ece-08-09,
 author = {J. M. Siskind and
           B. A. Pearlmutter},
 title = {Nesting Forward-Mode {AD} in a Functional Framework},
 number = {TR-ECE-08-09},
 institution = {School of Electrical and Computer Engineering, Purdue
                University},
 month = oct,
 year = 2008,
 url = {http://docs.lib.purdue.edu/ecetr/377}}