@article{Hou_2013, doi = {10.1103/physreva.88.043630}, url = {http://dx.doi.org/10.1103/physreva.88.043630}, year = 2013, month = {oct}, publisher = {American Physical Society ({APS})}, volume = {88}, number = {4}, author = {Yan-Hua Hou and Lev P. Pitaevskii and Sandro Stringari}, title = {First and second sound in a highly elongated Fermi gas at unitarity}, journal = {Phys. Rev. A} }