@article{betts_campbell_digirolamo_2021, title={EXAMINATION OF SOLVING OPTIMAL CONTROL PROBLEMS WITH DELAYS USING GPOPS-II}, volume={11}, ISBN={2155-3297}, DOI={10.3934/naco.2020026}, number={2}, journal={NUMERICAL ALGEBRA CONTROL AND OPTIMIZATION}, author={Betts, John T. and Campbell, Stephen and Digirolamo, Claire}, year={2021}, month={Jun}, pages={283–305} }
 @article{betts_campbell_digirolamo_2020, title={INITIAL GUESS SENSITIVITY IN COMPUTATIONAL OPTIMAL CONTROL PROBLEMS}, volume={10}, ISBN={2155-3297}, DOI={10.3934/naco.2019031}, number={1}, journal={NUMERICAL ALGEBRA CONTROL AND OPTIMIZATION}, author={Betts, John T. and Campbell, Stephen L. and Digirolamo, Claire}, year={2020}, month={Mar}, pages={39–43} }