The Sequence of the Introduction of Crisis Management System Based on Diversification of Activities of Service Sector Enterprises. Ekon. čas. Volins. nac. unìv. ìm. Lesì Ukraïnki [Internet]. 2015 Dec. 28 [cited 2024 Dec. 23];4(4):54-7. Available from: https://echas.vnu.edu.ua/index.php/echas/article/view/174