References

• Dommanget J., Nys O., 1994, R. Obs. Bel., Commun. Ser. A, No. 115
• Jasinta D.M.D., Raharto M., Soegiartini E., 1995, A&AS 114, 487 NASA ADS
• van Albada-van Dien E., 1983, A&AS 52, 193 NASA ADS