HARON, Kassim; , Maiyastri. Principal Component Analysis in Modelling Stock Market Returns. MATEMATIKA, [S. l.], v. 20, p. 31–41, 2004. DOI: 10.11113/matematika.v20.n.142. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/142. Acesso em: 4 may. 2024.