Title	An Exact Algorithm for the Single-Depot Multiple Travelling Salesman Problem
Author	Zakir Hussain Ahmed and Ibrahim Al-Dayel
Citation	Vol. 20  No. 9  pp. 65-75
Keywords	Multiple travelling salesman problem; NP-hard; Optimal; Exact; Bound; Lexisearch algorithm.

Title	Solving the Travelling Salesman Problem Using an Ant Colony System Algorithm
Author	Zakir Hussain Ahmed, Majid Yousefikhoshbakht, Abdul Khader Jilani Saudagar, and Shakir Khan
Citation	Vol. 23  No. 2  pp. 55-64
Keywords	Travelling Salesman Problem; Ant Colony System Algorithm; Global Updating; NP-hard Problems

Title	The Maximum Scatter Travelling Salesman Problem: A Hybrid Genetic Algorithm
Author	Zakir Hussain Ahmed, Asaad Shakir Hameed, Modhi Lafta Mutar, Mohammed F. Alrifaie, Mundher Mohammed Taresh
Citation	Vol. 23  No. 6  pp. 193-201
Keywords	Hybrid genetic algorithm; maximum scatter traveling salesman problem; sequential constructive crossover; adaptive mutation; local search; perturbation procedure.

Title	Optimization of the Travelling Salesman Problem Using a New Hybrid Genetic Algorithm
Author	Zakir Hussain Ahmed, Furat Fahad Altukhaim, Abdul Khader Jilani Saudagar, and Shakir Khan
Citation	Vol. 24  No. 3  pp. 12-22
Keywords	Travelling salesman problem; Hybrid genetic algorithm; Comprehensive sequential constructive crossover; Adaptive mutation; Local search; Replacement method.