Nuclear demagnetization cryostat at University of Florida Microkelvin Laboratory, J. Xu, O. Avenel, J. S. Xia, M.-F. Xu, T. Lang, P. L. Moyland, W. Ni, E. D. Adams, G. G. Ihas, M. V. Meisel, N. S. Sullivan, Y. Takano, Journal of Low Temperature Physics 89 (1992) 719-723,
https://doi.org/10.1007/BF00694125