Nalavade, Sandeep, et al. “A Critical Review of Oxygen Equipment for Long-Term Oxygen Therapy With the Aid of Renewable Energy Sources and Comparison for Use in Low-Resource Settings”. Journal of Integrated Science and Technology, vol. 12, no. 5, Feb. 2024, p. 819, https://doi.org/10.62110/sciencein.jist.2024.v12.819.