Ummah, Galih Syifa’ul, Bambang Piscesa, and Yuyun Tajunnisa. 2025. “Stress-Strain Behavior of Confined Class C Fly Ash-Based Geopolymer Concrete”. IPTEK The Journal of Engineering 10 (2):137-46. https://journal.its.ac.id/index.php/joe/article/view/8253.