Proceedings Proceedings of the 11th International Doctoral Seminar (IDS 2019). 30th Central European Conference on Information and Intelligent Systems : 11th International Doctoral Seminar, Varaždin, Croatia, 3rd October 2019. -- 1. vyd. -- Varaždin : University of Zagreb, 2019. -- 46 s. -- ISBN : 978-953-6071-67-8.