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Breathing rhythms and emotions. Homma I, Masaoka Y, Exp Phisiol 2008 Sep;93.9(9):pp1011-21

Lena Akai, Ikuo Homma, Makiko Okuyama. Effects of Respiratory Muscle Stretch Exercise and Ikebana on the Anxiety of Children in the Tsunami Disaster Area. 61st Annual Meeting of American Academy of Adolescent and Child Psychiatry. (October 2014, San Diego, CA, USA)

Kai Saruwatari, Lena Akai. Breathing Music: A study on the Synchronization of Music and Breath. Annual Conference of the Japan Emotionology Society. (November 2022, Toyama, Japan)