K. Dimitrov. Industrial Growth Conference 2020 - Conference proceedings, page 132-139. University of National and World Economy, Publishing complex – UNWE, (2021)
C. Bauer, M. Schedl, V. Angerer, and S. Wegenkittl. Proceedings of the 27th ACM International Conference on Multimedia, page 1044-1046. Nice, france, ACM, (October 2019)