T. Wetzel

Performance of a second-order neighboring optimal control scheme

D. Moerder, B. Pierson, T. Wetzel, 1996 .

Variational Trajectory Optimization Tool Set: Technical description and user's manual

Eric M. Queen, Daniel D. Moerder, Robert R. Bless, 1993 .

Development of a finite-difference neighboring optimal control law and application to the optimal landing of a reusable launch vehicle

Todd Andrew Wetzel, T. Wetzel, 1996 .

Does the principle of optimality hold along collocation solutions

Hans Seywald, Todd A. Wetzel, Renjith R. Kumar, 1996 .