Abubakar Siddiq (2026) “ADVANCED APPROXIMATION AND PARAMETERIZED ALGORITHMS FOR SOLVING NP-HARD COMBINATORIAL OPTIMIZATION PROBLEMS IN LARGE-SCALE GRAPH SYSTEMS”, Policy Research Journal, 4(4), pp. 48–57. Available at: https://policyrj.com/1/article/view/1768 (Accessed: 21 April 2026).