@misc{indiciaedfe6a2100029,
  title = {ROSAT data analysis with EXSAS},
  author = {Zimmermann, H. U. and Belloni, T. and Izzo, C. and Kahabka, P. and Schwentker, O.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19940018082},
  note = {Source identifier: 19940018082}
}