@misc{indiciae88b06b5e449e,
  title = {Hot Gas in Planetary Nebulae},
  author = {Gruendl, Robert A. and Chu, You-Hua and Guerrero, Martin},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20040005899},
  note = {Source identifier: 20040005899}
}