Optimal flight trajectories for the validation of aerodynamic models. - Ilia Gherman; Volker Schulz 001; J. T. Betts (Optim. Methods Softw., 2006)

Approximate Nullspace Iterations for KKT Systems. - Kazufumi Ito; Karl Kunisch; Volker Schulz 001; Ilia Gherman (SIAM J. Matrix Anal. Appl., 2010)