Engelbert Tijskens D. Roose Herman Ramon Josse De Baerdemaeker FastDer++, efficient automatic differentiation for non-linear PDE solvers. 177-190 2004 65 Mathematics and Computers in Simulation 1-2 http://dx.doi.org/10.1016/j.matcom.2003.09.014 db/journals/mcs/mcs65.html#TijskensRRB04