Zharkov, I. P., A. N. Ivaschenko, Sаfrоnоv V. V., Sеlivanov A. V., and Sоlоnetsky A. G. “Extension of Temperature Control Interval in Liquid-Flow Helium Cryostats”. Ukrainian Journal of Physics, vol. 63, no. 10, Oct. 2018, p. 916, doi:10.15407/ujpe63.10.916.