Naomi Katayama, et al. “Results of Comparison of Two Types of Olfactory Recognition Tests Performed on 112 Peoples. - 34 High School Students, 55 University Students, and 23 Middle-Aged”. Global Journal of Medical Research, vol. 20, no. K6, May 2020, pp. 31-35, https://medicalresearchjournal.org/index.php/GJMR/article/view/2106.