List of Articles Mehdi Yadollahi Article 1 - HGELS: A New Hybrid Algorithm Based on Gravitational Force for Solving Multiple Traveling Salesman Problems Touraj Mohammadpour Mehdi Yadollahi Amir Massoud Bidgoli Habib Esmaeelzadeh Rostam Journal of Advances in Computer Research , Issue 4 , Year , Summer 2016
