Hussein Ali Salman, Faik Mayah. Invariant Quantity of Prime Knots and Links Using Seifert van-Kampen Theorem. wjps [Internet]. 2025 Mar. 30 [cited 2025 Oct. 1];4(1):1-11. Available from: https://wjps.uowasit.edu.iq/index.php/wjps/article/view/625