@misc{indiciae91bd75d8cf35,
  title = {ESR pumping experiments in spin-polarized atomic hydrogen.},
  author = {AP Mattheij and van Zwol J and JT Walraven and IF Silvera},
  year = {1988},
  doi = {10.1103/physrevb.37.4831},
  url = {https://pubmed.ncbi.nlm.nih.gov/9943653/},
  note = {Source identifier: 9943653}
}