Khaskheli, Ghulam Mustafa, Marina Sherbaz, and Umair Ramzan Shaikh. “A Comparative Usability Study of Single-Factor and Two-Factor Authentication”. Tropical Scientific Journal 1, no. 1 (February 23, 2022): 17–27. Accessed May 15, 2025. https://www.scientificacademic.com/index.php/tsj/article/view/3.