@misc{indiciae9874a2a2ffa1,
  title = {Progress in High Power Free-Piston Stirling Convertor Development},
  author = {Brandhorst, Henry W., Jr. and Kirby, Raymond L. and Chapman, Peter A. and Walter, Thomas J.},
  year = {2008},
  url = {https://ntrs.nasa.gov/citations/20080047357},
  note = {Source identifier: 20080047357}
}