@inproceedings{HeiNoceWalt08,
  author = 	 {L. Hei and J. Nocedal and R. A. Waltz},
  title = 	 {A Numerical Study of Active-Set and Interior-Point Methods for Bound
                  Constrained Optimization},
  year = 	 {2008},
  booktitle      = {Modeling, Simulation and Optimization of Complex Processes:
                   Proceedings of the International Conference on High Performance Scientific
                   Computing,  2006, Hanoi, Vietnam},
 editor         = { Bock H. G. and Kostina E. A. and Phu H. X. and Rannacher R.} ,
 publisher      = {Springer},
}