MATTAR, Joao. Distance learning, emergency remote teaching and blended learning: research methodologies. In: Visiones en educación sin barreras ni fronteras: Un homenaje al Maestro Lorenzo García Aretio. InstitucionalColombia,CO: Sello Editorial UNAD,2021. p. 30–37. DOI: 10.22490/9789586518260.1.3. Disponível em: https://libros.unad.edu.co/index.php/selloeditorial/catalog/book/109/chapter/961. Acesso em: 4 aug. 2025.