B. Holzinger, K. Levec, M.-M. Munzinger, and G. Klösch, “Sleep coaching: non-pharmacological treatment of non-restorative sleep in Austrian railway shift workers”, Arh Hig Rada Toksikol, vol. 70, no. 3, Aug. 2019, doi: 10.2478/aiht-2019-70-3244.