Ralf-Christian Härting, Kevin Bilge, Lisa Fleischer, Nadja Landgraf, Feride Özcakir, Marcel Wicher. Impact of the COVID-19 Crisis on Digital Business Models - Contactless Payments. In Gordan Jezic, Jessica Chen-Burger, Mario Kusek, Roman Sperka, Robert J. Howlett, Lakhmi C. Jain, editors, Agents and Multi-Agent Systems: Technologies and Applications 2021 - Proceedings of 15th KES International Conference, KES-AMSTA 2021, June 2021. Volume 241 of Smart Innovation, Systems and Technologies, pages 143-153, Springer, 2021. [doi]
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