@misc{indiciae12bde2e9e1d4,
  title = {A He-3-gap heat switch for use below 2 K in zero G},
  author = {Roach, Pat R. and Helvensteijn, Ben P. M.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19930064614},
  note = {Source identifier: 19930064614}
}