Theory Based as a qualitative path in the study of old age: a narrative review . Revista Torreón Universitario, [S. l.], v. 10, n. 29, p. 64–73, 2021. DOI: 10.5377/rtu.v10i29.12731. Disponível em: https://revistas.unan.edu.ni/index.php/Torreon/article/view/3059. Acesso em: 9 aug. 2025.