Akingbade, Afolajimi, and Oyejide Oluwamayowa Ogunwole. 2017. “Game Theoretic Analysis of the Competition Among Global System for Mobile Communications (GSM) Firms in Nigeria”. The International Journal of Humanities & Social Studies 5 (5). http://internationaljournalcorner.com/index.php/theijhss/article/view/125361.