@misc{indiciae7423078829e6,
  title = {Time ordering of two-step processes in energetic ion-atom collisions: Basic formalism.},
  author = {N Stolterfoht},
  year = {1993},
  doi = {10.1103/physreva.48.2980},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909948/},
  note = {Source identifier: 9909948}
}