@article{11455,
  author = {W. Baylis},
  title = {Optical-pumping effects in level-crossing measurements},
  year = {1968},
  journal = {Physics Letters A},
  volume = {26},
  pages = {414-415},
  month = {Jan-03-1968},
  issn = {03759601},
  url = {http://linkinghub.elsevier.com/retrieve/pii/0375960168902508},
  doi = {10.1016/0375-9601(68)90250-8},
}