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Okrasa, Michal and Wozniak, Mikolaj P. and Walczak, Anna and Bartlomiejczyk, Natalia and Müller, Heiko and Grudzien, Krzysztof and Romanowski, Andrzej (2022) Supporting self-development of speech delivery for education professionals. In: Proceedings of the 21st International Conference on Mobile and Ubiquitous Multimedia, November 27 - 30, 2022, Lisbon, Portugal.