@misc{indiciae854668c48466,
  title = {A method for shock determination and classification and Helios observations of fast, intermediate and slow interplanetary shocks},
  author = {Liu, S. and Marsch, E. and Schwenn, R. and Rosenbauer, H.},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19960021433},
  note = {Source identifier: 19960021433}
}