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Hammerschall, Ulrike. (2019). [IEEE 2019 IEEE Global Engineering Education Conference (EDUCON) - Dubai, United Arab Emirates (2019.4.8-2019.4.11)] 2019 IEEE Global Engineering Education Conference (EDUCON) - A Gamification Framework for Long-Term Engagement in Education Based on Self Determination Theory and the Transtheoretical Model of Change. , (), 95–101. doi:10.1109/EDUCON.2019.8725251 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research