Y. Chidambaram, A. T. Mujeebullah, S. Soundarapandiyan, S. Senthilkumar, A. Subramanian, and M. Kuppusamy, “Effect of peppermint oil steam inhalation on pulmonary function in patients with bronchial asthma: a case series”, Int J Community Med Public Health, vol. 12, no. 9, pp. 4157–4161, Aug. 2025.