@article{shen_xue_pu_2009,  title={A filter SQP algorithm without a feasibility restoration phase},  volume={28},  ISSN={1807-0302},  url={https://doi.org/10.1590/S1807-03022009000200003},  DOI={10.1590/S1807-03022009000200003},  number={2},  journal={Computational & Applied Mathematics},  publisher={Sociedade Brasileira de Matemática Aplicada e Computacional},  author={Shen, Chungen and Xue, Wenjuan and Pu, Dingguo},  year={2009},  pages={167–194} }