@article{3135,
  keywords = {pfc},
  author = {X. Dai and M. Richter and H. Li and Alan Bristow and Cyril Falvo and Shaul Mukamel and Steven Cundiff},
  title = {Two-Dimensional Double-Quantum Spectra Reveal Collective Resonances in an Atomic Vapor},
  year = {2012},
  journal = {Physical Review Letters},
  volume = {108},
  pages = {193201},
  month = {2012-05},
  doi = {10.1103/PhysRevLett.108.193201},
}