@article{2159,
  author = {S. Blatt and A. Ludlow and G. Campbell and J. Thomsen and Tanya Zelevinsky and M. Boyd and Jun Ye and X. Baillard and M. Fouché and R. Le Targat and A. Brusch and P. Lemonde and M. Takamoto and F.-L. Hong and H. Katori and Victor Flambaum},
  title = {New Limits on Coupling of Fundamental Constants to Gravity Using 87Sr Optical Lattice Clocks},
  year = {2008},
  journal = {Physical Review Letters},
  volume = {100},
  month = {Jan-04-2008},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.100.140801},
}