M’ITONGA, F. M. Influence of Value-Added Service Strategies on Performance of Telecommunication Firms in Kenya: A Literature Based Review. Journal of Strategic Management, [S. l.], v. 3, n. 1, p. 69–81, 2019. Disponível em: https://stratfordjournalpublishers.org/journals/index.php/journal-of-strategic-management/article/view/278. Acesso em: 12 mar. 2026.