A 15-MINUTE ABDOMINAL BREATHING EXERCISE PROMOTES NAP IN UNDERGRADUATES: INSTRUMENTAL STUDY FINDINGS ArticleKhuurak A.E., Shumov D.E., Sveshnikov D.S., Bakaeva Z.V., Yakunina E.B., Torshin V.I., Dementienko V.V., Dorokhov V.B.Journal of Evolutionary Biochemistry and Physiology. Том 60. 2024. С. S115-S124