Zehraoui, Sabiha, and Anna Provodnikova. “Crisis Management: Case Study of Nyiragongo Volcano Eruption 2021 in Democratic Republic of Congo”. Global journal of Business and Integral Security 4, no. 6 (December 16, 2021). Accessed July 7, 2025. https://gbis.ch/index.php/gbis/article/view/44.