Snizhko, Y. M., and V. M. Sarana. “The Influence of External Factors on the Accuracy of Non-Invasive Measuring of Oxygen in Blood”. Regulatory Mechanisms in Biosystems 7, no. 2 (May 29, 2016): 78-82. Accessed March 23, 2023. https://medicine.dp.ua/index.php/med/article/view/281.