VAN DER WESTHUIZEN, G. Bank Productivity And Sources Of Efficiency Change: A Case Of The Four Largest Banks In South Africa. International Business & Economics Research Journal (IBER), [S. l.], v. 12, n. 2, p. 127–138, 2013. DOI: 10.19030/iber.v12i2.7625. Disponível em: https://clutejournals.com/index.php/IBER/article/view/7625. Acesso em: 17 jul. 2024.