Berdnikov, A., N. Yunusov, D. Vorosnin, and D. Misiev. “Optical Device for Determining the Viability of Biological Tissue”. Amazonia Investiga, Vol. 8, no. 24, Nov. 2019, pp. 193-8, https://amazoniainvestiga.info/index.php/amazonia/article/view/971.