The Sequence of the Introduction of Crisis Management System Based on Diversification of Activities of Service Sector Enterprises. Economic journal of Lesya Ukrainka Volyn National University, [S. l.], v. 4, n. 4, p. 54–57, 2015. DOI: 10.29038/2411-4014-2015-04-54-57. Disponível em: https://echas.vnu.edu.ua/index.php/echas/article/view/174.. Acesso em: 17 may. 2024.