Böke, Hulusi. “On the Health of Staff of the Provincial Directorate of Youth and Sports During the COVID-19 Epidemic: Researching the Levels of Physical Activity and Social Media Addiction”. Progress in Nutrition, vol. 23, no. S2, Sept. 2021, p. e2021259, https://doi.org/10.23751/pn.v23iS2.11942.