BBPL   - Blackwell et al. (1989) (1989MNRAS.236..235B) 
BGF    - Biemont et al. (1989) (1989A&A...209..391B) 
BHN    - Bizzari et al. (1993) (1993A&A...273..707B)
BK     - Bard & Kock (1994) (1994A&A...282.1014B)
BKK    - Bard et al. (1991) (1991A&A...248..315B)
BL     - O'Brian & Lawler (1991) (1991PhRvA..44.7134O)
BM     - Bengston & Miller (1970) Bengston, R.D., & Miller, M.H. 1970, JOSA, 60, 1093
BWL    - O'Brian et al. (1991) (1991JOSAB...8.1185O)
FMW    - Fuhr et al. (1988) (1988atpi.book.....F)
H      - Hibbert (1988) Hibbert, A. 1988, Phys. Scr., 38, 37
HL     - Hannaford et al. (1982) (1982ApJ...261..736H)
K88    - Kurucz (1988) Kurucz, R.L. 1988, Trans. IAU, XXB, M. McNally, ed., Dordrecht: Kluwer, 168-172
KurXX  - Kurucz calculations of the XX year
KG     - Kling & Griesmann (2000) (2000ApJ...531.1173K)
KP     - Kurucz & Peytremann (1975) (1975SAOSR.362.....K)
KP08   - Kelleher & Podobedova (2008) Kelleher, D.E., & Podobedova, L.I. 2008, J. Phys. Chem. Ref. Data, 37, No.3, 1285
KSG    - Kling et al. (2001) (2001ApJS..134..173K)
L      - Lilly (1976) Lilly, R.A. 1976, JOSA, 66, 971
LD     - Lawler & Dakin (1989) Lawler, J.E. & Dakin, J.T. 1989, JOSA B6, 1457 
LNAJ   - Ljung et al. (2006) (2006A&A...456.1181L)
MFW    - Martin et al. (1988) Martin, G.A., Fuhr, J.R., & Wiese, W.L. 1988, J. Phys. Chem. Ref. Data, 17, Suppl.3
MRB    - Miller et al. (1971) (1971PhRvA...4.1709M)
MW     - Miles & Wiese (1969) (1969AD......1....1M)
MWRB   - Miller et al. (1974) Miller, M.H., Wilkerson, T.D., Roig, R.A. & Bengston, R.D. 1974, Phys. Rev. A, 9, 2312
NIST08 - Ralchenko et al. (2008) Ralchenko, Yu., Kramida, A.E., Reader, J., & NIST ASD Team. 2008, NIST Atomic Spectra Database (version 3.1.5), available: http://physics.nist.gov/asd3,  NIST, Gaithersburg, MD
PTP    - Pickering et al. (2001) (2001ApJS..132..403P)
RHL    - Ryabchikova et al. (1994) (1994MNRAS.267..697R)
RPU    - Raassen et al. (1998) (1998A&A...340..300R)
RRKB   - Ryabchikova et al. (2006) (2006A&A...456..329R)
RU     - Raassen & Uylings (1998); Raassen & Uylings database (ftp://ftp.wins.uva.nl/pub/orth)
S      - Smith (1988) Smith, G. 1988, J. Phys. B., 21, 2827
SG     - Smith & Gallagher (1966) Smith, G. & Gallagher, A. 1966, Phys. Rev., 145, 26
SN     - Smith & O'Neil (1975) (1975A&A....38....1S)
SR     - Smith & Raggett (1981) (1981JPhB...14.4015S)
SW     - Smith & Wiese (1971) (1971ApJS...23..103S)
T      - Theodosiou (1989) (1989PhRvA..39.4880T)
TB     - Seaton et al. (1994) (1994MNRAS.266..805S)
Wa     - Warner (1968a) (1968MNRAS.139..115W)
Wb     - Warner (1968b) (1968MNRAS.140...53W)
WF     - Wiese & Fuhr (2007) Wiese, W. L. & Fuhr, J. R. 2007, J. Phys. Chem. Ref. Data	36, 1287
WLa    - Wickliffe & Lawler (1997) (1997ApJS..110..163W)
WSG    - Wiese et al. (1966) (1966atp..book.....W)
WSM    - Wiese et al. (1969) (1969atp..book.....W)