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Kratz, Jonathan L.; Thomas, George L. . (). [American Institute of Aeronautics and Astronautics AIAA Propulsion and Energy 2019 Forum - Indianapolis, IN ()] AIAA Propulsion and Energy 2019 Forum - Dynamic Analysis of the STARC-ABL Propulsion System. , (), –. doi:10.2514/6.2019-4182 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research