Malmberg, L.-E., W. H. T. Lim, A. Tolvanen, and J.-E. Nurmi. “Within-Student Variability in Learning Experiences, and teachers’ Perceptions of students’ Task-Focus”. Frontline Learning Research, vol. 4, no. 5, Jan. 2017, pp. 62-82, doi:10.14786/flr.v4i5.227.