An indirect approach for singular optimal control problems. - Oswaldo Andrés-Martínez; Lorenz T. Biegler; Antonio Flores-Tlacuahuac (Comput. Chem. Eng., 2020)

A switched system approach for the direct solution of singular optimal control problems. - Oswaldo Andrés-Martínez; Luis A. Ricardez-Sandoval (Comput. Chem. Eng., 2022)