@misc{indiciaec9904bc19b21,
  title = {Preliminary Analysis for an Optimized Oil-Free Rotorcraft Engine Concept},
  author = {Howard, Samuel A. and Bruckner, Robert J. and DellaCorte, Christopher and Radil, Kevin C.},
  year = {2008},
  url = {https://ntrs.nasa.gov/citations/20080015823},
  note = {Source identifier: 20080015823}
}