Pilcher, J. J., Switzer, F. S. III, Munc, A., Donnelly, J, Jellen, J. C., & Lamm, C. (2018). Psychometric properties of the Epworth Sleepiness Scale: A factor analysis and item-response theory approach. Chronobiology International, 35(4), 533-545. doi: 10.1080/07420528.2017.1420075
