Hamza, Muhammad, and Ahmed Muddassir Khan. “Challenges and Opportunities of Industrial Revolution 4.0 in Renewable Energy Sector of Pakistan: Case Study”. Pakistan Journal of Engineering and Technology 4, no. 2 (June 5, 2021): 32–37. Accessed July 5, 2025. https://journals.uol.edu.pk/pakjet/article/view/894.