Das, I., B. Nageshwar Rao, J. Sundara Rajan, S. Seetharamu, and V. V. Rao. “Cryogenic Cooling Aspects of Hts Power Cables - A Review”. Power Research - A Journal of CPRI, June 2015, pp. 311-22, https://cprijournal.in/index.php/pr/article/view/727.