Exploiting Sparsity in the Direct Transcription Method for Optimal Control. - John T. Betts; William P. Huffman (Comput. Optim. Appl., 1999)

A direct approach to solving optimal control problems. - John T. Betts (Comput. Sci. Eng., 1999)

Convergence of Nonconvergent IRK Discretizations of Optimal Control Problems with State Inequality Constraints. - John T. Betts; Neil Biehn; Stephen L. Campbell (SIAM J. Sci. Comput., 2002)

Initialization of direct transcription optimal control software. - John T. Betts; Stephen L. Campbell; N. N. Kalla (CDC, 2003)

Optimal Low Thrust Trajectories to the Moon. - John T. Betts; Sven O. Erb (SIAM J. Appl. Dyn. Syst., 2003)

Large Scale Parameter Estimation Using Sparse Nonlinear Programming Methods. - John T. Betts; William P. Huffman (SIAM J. Optim., 2003)

Direct transcription solution of inequality constrained optimal control problems. - John T. Betts; Stephen L. Campbell; Anna Engelsone (ACC, 2004)

Order of Convergence in the Direct Transcription Solution of Optimal Control Problems. - Anna Engelsone; Stephen L. Campbell; John T. Betts (CDC/ECC, 2005)

Optimal control software for constrained nonlinear systems with delays. - John T. Betts; Stephen L. Campbell; Karmethia C. Thompson (CACSD, 2011)

Lobatto IIIA methods, direct transcription, and DAEs with delays. - John T. Betts; Stephen L. Campbell; Karmethia C. Thompson (Numer. Algorithms, 2015)

Comments on direct transcription solution of DAE constrained optimal control problems with two discretization approaches. - Stephen L. Campbell; John T. Betts (Numer. Algorithms, 2016)