Atefeh Hasan-Zadeh, & Mostafa Yousefi. (2022). 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, 8(6), 1–9. https://doi.org/10.31695/IJERAT.2022.8.6.1