N. Gerasimov, L. Zarkova, B. Stefanov, N. Popkirova, “Measurement of the thermal-conductivity of monatomic potassium vapor ($700$–$1700$-degrees-K) and determination of the $^3\Sigma_g^+$ interaction potential of $2$ potassium atoms”, TVT, 21:1 (1983), 59–65; High Temperature, 21:1 (1983), 52–57
