CRUZ-SACO, María Amparo. Department classification in Peru by factor and accumulation analysis. Apuntes. Social Sciences Journal, [S. l.], n. 37, p. 73–89, 1995. DOI: 10.21678/apuntes.37.424. Disponível em: https://revistas.up.edu.pe/apuntes/article/view/424. Acesso em: 21 sep. 2026.