WZ Oph
References
Popper1965
Popper, Daniel M. “Rediscussion of Eclipsing Binaries. VII. WZ Ophiuchi and Other Solar-Type Stars”: 1965, The Astrophysical Journal, Volume 141, pp. 126-144
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1965ApJ...141..126P&db_key=AST&high=3f567b0b2c02291