Media type: E-Article Title: Techno-Economic Assessment of Flexibility Options Versus Grid Expansion in Distribution Grids Contributor: Resch, Matthias; Buhler, Jochen; Schachler, Birgit; Sumper, Andreas imprint: Institute of Electrical and Electronics Engineers (IEEE), 2021 Published in: IEEE Transactions on Power Systems Language: Not determined DOI: 10.1109/tpwrs.2021.3055457 ISSN: 0885-8950; 1558-0679 Origination: Footnote: