Virich, V. D., Y. V. Gorbenko, G. P. Kovtun, S. S. Nagorny, T. S. Potina, D. A. Solopikhin, and A. P. Shcherban’. “Refining Ancient Lead by Vacuum Distillation”. East European Journal of Physics, Vol. 3, no. 4, Mar. 2017, pp. 60-65, doi:10.26565/2312-4334-2016-4-06.