عبد الكريم حسين ا. Employ the Principal Componants Manner in the Forecasting by Box – Jenkins Models. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 7, n. 1, p. 22–33, 2007. DOI: 10.33899/iqjoss.2007.032442. Disponível em: https://edusj.uomosul.edu.iq/index.php/stats/article/view/29141. Acesso em: 10 sep. 2025.