Ströhlein, JK, et al. “Dose-Response-Relationship between Physical Activity and Cognition in Elderly.”10.5960/dzsm.2017.300__Deutsche Zeitschrift Für Sportmedizin, vol. 2017, no. 10, Deutsche Zeitschrift Fur Sportmedizin/German Journal of Sports Medicine, 2017, pp. 234–42, doi:10.5960/dzsm.2017.300.