Donker, M. H., T. van Gog, and M. T. Mainhard. “A Quantitative Exploration of Two Teachers With Contrasting Emotions: Intra-Individual Process Analyses of Physiology and Interpersonal Behavior”. Frontline Learning Research, vol. 6, no. 3, Dec. 2018, pp. 162-85, doi:10.14786/flr.v6i3.372.