Santoyo Velasco, C., G. Jonsson, M. T. Anguera, and J. A. López-López. “Observational Analysis of the Organization of On-Task Behavior in the Classroom Using Complementary Data Analysis”. Anales De Psicología / Annals of Psychology, Vol. 33, no. 3, July 2017, pp. 497-14, doi:10.6018/analesps.33.3.271061.