@misc{indiciaefaa7c9f39e64,
  title = {Differential cross sections and angular-correlation parameters for n=3 excitations in hydrogen by electrons and positrons.},
  author = {AK Katiyar and R Srivastava},
  year = {1989},
  doi = {10.1103/physreva.40.1289},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902261/},
  note = {Source identifier: 9902261}
}