USMAN MAHMOOD. Ownership Concentration and its impact on Firm Performance. Pollster Journal of Academic Research, [S. l.], v. 2, n. 2, p. 122–142, 2015. Disponível em: https://pollsterpub.org/OJS_PJAR/index.php/PJAR/article/view/23.. Acesso em: 8 jun. 2025.