[1] Prestage J D, Weaver G L[J]. Proc. IEEE, 95, 2235(2007).
[3] Prestage J D, Chung S K, Thompson R J, Neal P M[J]. IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum, 54-7(2009).
[5] Larigani S T, Burt E A, Lea S N, Prestage J D, Tjoelker R L[J]. International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum, 774-777(2009).
[6] Coursey J S, Schwab D J, Tsai J J, Dragoset R A[J](2018). http://physics.nist.gov/Comp
[7] Zucker M A, Kishore A R, Sukumar R, Dragoset R A[J](2018). http://physics.nist.gov/EDI
[8] Angeli I, Marinova K P[J]. At. Data Nucl. Data Tables, 99, 69(2013).
[9] Stone N J[J]. At. Data Nucl. Data Tables, 90, 75(2005).
[10] Prestage J D, Janik G R, Dick G J, Maleki L[J]. Conference on Precision Electromagnetic Measurements, 270-271(1991).
[11] Tjoelker R L, Prestage J D, Maleki L[J]. Telecommun. Data Acquis. Prog. Rep., 126, 1(1996).
[16] Matveev O I, Smith B W, Winefordner J D[J]. Opt. Lett., 23, 304(1998).
[17] Zou H X, Wu Y, Chen G Z, Shen Y, Liu Q[J]. Chinese Phys. Lett., 32, 054207(2015).
[18] Cheal B, Cocolios T E, Fritzsche S[J]. Phys. Rev. A, 86, 042501(2012).
[19] Grant I P[J]. Relativistic Quantum Theory of Atoms and Molecules, 259-388(2007).
[20] Li J G, Jönsson P, Godefroid M, Dong C Z, Gaigalas G[J]. Phys. Rev. A, 86, 052523(2012).
[21] Fullerton L W, Rinker G A[J]. Phys. Rev. A, 13, 1283(1976).
[24] McDaniel E W, McDowell M R C[J]. Case Studies in Atomic Physics Ⅳ, 197-298(1975).
[25] Jönsson P, Parpia F A, Fischer C F[J]. Comput. Phys. Commun., 96, 301(1996).
[28] Shabaev V M[J]. Theor. Math. Phys., 63, 588(1985).
[29] Palmer C W P[J]. J. Phys. B At. Mol. Phys., 20, 5987(1987).
[30] Shabaev V M, Artemyev A N[J]. J. Phys. B At. Mol. Opt. Phys., 27, 1307(1994).
[31] Jönsson P, Froese C F[J]. Comput. Phys. Commun., 100, 81(1997).
[35] Brage T, Proffitt C, Leckrone D S[J]. Astrophys. J., 513, 524(1999).
[36] Simmons M, Safronova U I, Safronova M S[J]. Phys. Rev. A, 84, 052510(2011).
[37] Guern Y, Méhu A B, Abjean R, Gilles A J[J]. Phys. Scr., 14, 273(1976).