MIYAMOTO, Y. R.; COLEMAN, C.; WILLIAMS, J. J.; WHITEHILL, J.; NESTERKO, S.; REICH, J. Beyond Time-on-Task: The Relationship Between Spaced Study and Certification in MOOCs. Journal of Learning Analytics, [S. l.], v. 2, n. 2, p. 47-69, 2015. DOI: 10.18608/jla.2015.22.5. Disponível em: https://learning-analytics.info/index.php/JLA/article/view/4256. Acesso em: 4 mar. 2021.