Hadi, Miftachul, and Suhadi Muliyono. “A WEAK GRAVITATIONAL KNOT IN (2+1)-DIMENSIONAL EMPTY SPACE-TIME”. Indonesian Physical Review 8, no. 1 (December 29, 2024): 238–252. Accessed January 21, 2025. https://ipr.unram.ac.id/index.php/ipr/article/view/346.