Using portfolio theory to predict the impact of reduction in product width on sales. Journal of Business Economics and Management, [S. l.], v. 17, n. 6, p. 1222–1236, 2016. DOI: 10.3846/16111699.2015.1120769. Disponível em: https://journals.vilniustech.lt/index.php/JBEM/article/view/2304. Acesso em: 9 may. 2025.