Kamilani, M. P., and T. Wahyuliati. “Effectiveness of Rain Sound Music As a Relaxation Stimulus on Parasympathetic Nervous System Activity Based on Heart Rate and REM Sleep Stage”. Media Ilmiah Kesehatan Indonesia, vol. 4, no. 3, Sept. 2026, pp. 208-16, doi:10.58184/miki.v4i3.1063.