Lugendo, I. J. “Performance of a Customized Cryo-Cooling System Designed for the Measurement of the Lifetime of Nuclear Excited States at Cryogenic Temperatures”. Tanzania Journal of Science, vol. 45, no. 1, Mar. 2021, pp. 53-66, https://tjs.udsm.ac.tz/index.php/tjs/article/view/176.