@article{oai:oist.repo.nii.ac.jp:00001059,
 author = {Nieddu, T. and Ray, T. and Rajasree, K. S. and Roy, R. and Chormaic, S. Nic},
 issue = {5},
 journal = {Optics Express},
 month = {Feb},
 pages = {6528--6535},
 title = {Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S1/2 to 6S1/2 transition using one-color two-photon excitation},
 volume = {27},
 year = {2019}
}