RY Aqr

References

1. Helt1987a
   Helt, B.E. “Four-colour Photometry of Eclipsing Binaries XXVI B. - Light Curves of RY Aqr”: 1987, Astronomy and Astrophysics Supplement Series, Volume 68, pp. 187-192
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1987A%26AS...68..187H&db_key=AST&high=3f2ea4260a03732

2. Helt1987b
   Helt, B.E. “Four-colour Photometry of Eclipsing Binaries. XXVI A - RY Aqr: A Low-mass Semidetached System with Intrinsic Variability”: 1987, Astronomy & Astrophysics, Volume 172, pp. 155-166
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1987A%26A...172..155H&db_key=AST&high=3f2ea4260a03732

3. Popper1989
   Popper, Daniel M. “Radial Velocities in 12 Algol Binaries”: 1989, Astrophysical Journal Supplement Series, Volume 71, pp. 595-621
   http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1989ApJS...71..595P&db_key=AST&high=3f2ea4260a03732