Aydogan, C., C. Schellekens, and C. Wullschleger. “EFFECTS OF A WILD GREEN OAT EXTRACT ON MENTAL PERFORMANCE: A HUMAN CLINICAL STUDY USING SOURCE DENSITY ANALYSIS OF THE HUMAN EEG”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 6, May 2009, pp. 478-9, https://athmsi.org/journals/index.php/ajtcam/article/view/931.