@misc{indiciaecdc8ae8cb1c0,
  title = {Propellant Flow Actuated Piezoelectric Igniter for Combustion Engines},
  author = {Wollen, Mark A.},
  year = {2018},
  url = {https://ntrs.nasa.gov/citations/20180002677},
  note = {Source identifier: 20180002677}
}