1. Karnopp, D.: Active Damping in Road Vehicle Suspension Systems. Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility 12(6), 291–311 (1983),
http://dx.doi.org/10.1080/00423118308968758
2. Marks II, R.J.: Introduction to Shannon Sampling and Interpolation Theory. Springer, New York (1991)
3. GNU Octave: The source code is freely redistributable under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation,
http://www.gnu.org/software/octave/license.html
4. NLopt: The library is under the GNU Lesser General Public License (LGPL), and the copyrights are owned by a variety of authors,
http://ab-initio.mit.edu/wiki/index.php/NLopt
5. Kraft, D.: A software package for sequential quadratic programming. Technical Report DFVLR-FB 88-28, Institut für Dynamik der Flugsysteme, Oberpfaffenhofen (July 1988)