@article{10508,
  author = {M. Basko},
  title = {Search for Periodicity in Optical Light Variations of CYG X-2},
  year = {1977},
  journal = {Annals of the New York Academy of Sciences},
  volume = {302},
  pages = {403-407},
  month = {Jan-12-1977},
  issn = {0077-8923},
  url = {http://doi.wiley.com/10.1111/j.1749-6632.1977.tb37061.x},
  doi = {10.1111/nyas.1977.302.issue-110.1111/j.1749-6632.1977.tb37061.x},
}