Convergence Analysis for Approximations of Optimal Control Problems Subject to Higher Index Differential-Algebraic Equations and Mixed Control-State Constraints. - Björn Martens; Matthias Gerdts (SIAM J. Control. Optim., 2020)

Convergence Analysis for Approximations of Optimal Control Problems Subject to Higher Index Differential-Algebraic Equations and Pure State Constraints. - Björn Martens; Matthias Gerdts (SIAM J. Control. Optim., 2021)

Error estimates for Runge-Kutta schemes of optimal control problems with index 1 DAEs. - Björn Martens (Comput. Optim. Appl., 2023)