ATEFEH HASAN-ZADEH; MOSTAFA YOUSEFI. Challenges and Opportunities Created in Business Due to Pandemic Coronavirus and Strategic & Tactics to Manage Critical Conditions. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695/IJERAT, [S. l.], v. 8, n. 6, p. 1–9, 2022. DOI: 10.31695/IJERAT.2022.8.6.1. Disponível em: https://ijerat.com/index.php/ijerat/article/view/618. Acesso em: 29 sep. 2022.