@misc{indiciae34c73711515e,
  title = {Chandra Observations of M28},
  author = {Weisskopf, Martin and Becker, Werner and Swartz, Douglas A. and Pavlov, George G. and Elsner, Ronald F. and Grindlay, Jonathan and Mignani, Roberto and Tennant, Allyn F. and Backer, Don and Pulone, Luigi},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20030062079},
  note = {Source identifier: 20030062079}
}