@misc{indiciae61edab6ecc2e,
  title = {A nonproprietary, nonsecret program for calculating Stirling cryocoolers},
  author = {Martini, W. R.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860001917},
  note = {Source identifier: 19860001917}
}