Sherif Ismail El-Halaby, et al. “The Impact of COVID-19 Pandemic on Financial Performance: Comparison Between Egyptian SMEs Tamayoz and EGX30 Index”. Asian Academy of Management Journal, vol. 28, no. 2, Dec. 2023, pp. 371–419, https://doi.org/10.21315/aamj2023.28.2.13.