KOŠMELJ, Katarina. Principal component analysis: theory and illustration. Acta agriculturae Slovenica, Ljubljana, SI, v. 89, n. 1, p. 159–172, 2007. DOI: 10.14720/aas.2007.89.1.15019. Disponível em: https://journals.uni-lj.si/aas/article/view/15019. Acesso em: 23 mar. 2025.