@misc{indiciaeb5aef67203c7,
  title = {Stirling engine: Available tools for long-life assessment},
  author = {Halford, Gary R. and Bartolotta, Paul A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910003667},
  note = {Source identifier: 19910003667}
}