Peter ON, Uzor OH, Judith A. Impact of product maturity on competitive advantage: A study of Unilever, Nigeria. Int. J. of Health Sci. [Internet]. 2022 Aug. 21 [cited 2026 Mar. 28];6(S4):12370-84. Available from: https://sciencescholar.us/journal/index.php/ijhs/article/view/11968