V1647 Sgr

References

1. Clausen1977
   Clausen, J. V., Gyldenkerne, K., and Gronbech. B. “Four-colour Photometry of Eclipsing Binaries. VI - V 1647 Sagittarii, Light Curves, Photometric Elements and Apsidal Motion”: 1977, Astronomy and Astrophysics, Volume 58, pp. 121-129
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1977A%26A....58..121C&db_key=AST&high=3f2ea4260a29821

2. Andersen1985
   Andersen, J. and Gimenez, A. “Absolute Dimensions of Eclipsing Binaries. VII - V 1647 Sagittarii”: 1985, Astronomy and Astrophysics, Volume 145, pp. 206-214
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1985A%26A...145..206A&db_key=AST&high=3f2ea4260a29821