ER Vul

References

1. Hill1990
   Hill, G., Fisher, W. A. & Holmgren, D. “Studies of late-type binaries. IV - The physical parameters of ER Vulpeculae”: 1990, Astronomy & Astrophysics, Volume 238, pp. 145-159
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1990A%26A...238..145H&db_key=AST&high=3f2ea4260a28364

2. Guinan1991
   Guinan, E. F., Bradstreet, D. H., Etzel, P. B., Ibanoglu, C., Ready, C. J., Steelman, D. P. & Thrash, T. A. “Simultaneous IUE and Ground-Based Observations of ER Vul Over Two Orbits”: 1991, Bulletin of the American Astronomical Society, Volume 23, p.1412
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1991BAAS...23.1412G&db_key=AST&high=3f2ea4260a27859