Guo P. J., Kim J., Rubin R. How Video Production Affects Student Engagement: An Empirical Study of MOOC Videos // Proceedings of the First ACM Conference on Learning @ Scale Conference. 2014. P. 41–50. См. также: Guo P. J. Optimal Video Length for Student Engagement // edX (blog). 2013. November 13. https://www.edx.org/blog/optimal-video-length-student-engagement#.U71MsxZFFBW.
