Krzysztof LIGEZA and Klaudia SKELNIK, “Maritime Security – Effects of The Environment on Anti-Submarine Warfare,” Proceedings of the 37th International Business Information Management Association (IBIMA), ISBN: 978-0-9998551-6-4, 30-31 May 2021, Cordoba, Spain, p 5358-5368.
Krzysztof LIGEZA and Klaudia SKELNIK, “The Mechanism of Creating Filter Bubbles in the Social Information Space, and the Influence of This Phenomenon on Public Security,” Proceedings of the 37th International Business Information Management Association (IBIMA), ISBN: 978-0-9998551-6-4, 30-31 May 2021, Cordoba, Spain, p 5396-5404.