@article{3522,
  author = {Christian Hagemann and Christian Grebing and C. Lisdat and Stephan Falke and Thomas Legero and Uwe Sterr and Fritz Riehle and M. Martin and Jun Ye},
  title = {Ultrastable laser with average fractional frequency drift rate below 5 x 10-19_s},
  year = {2014},
  journal = {Optics Letters},
  volume = {39},
  pages = {5102},
  month = {2014-01},
  issn = {0146-9592},
  url = {http://www.opticsinfobase.org/abstract.cfm?URI=ol-39-17-5102},
  doi = {10.1364/OL.39.005102},
}