YY Geminorum. I - Photometry and absolute dimensions
YY Geminorum: A Very Late Type Close Binary with Possible Magnetic Stellar Wind
YY Her Secondary Eclipses in the System Revealed
YY Her - Secondary Eclipses in the System Revealed
YY Her -- The primary eclipse in the system confirmed and a secondary one revealed
YY Her photometric history over 1890-1996 (Munari+ 1997)
YY Herculis
YY Herculis
YY Herculis
YY Herculis
YY Herculis
YY Herculis
YY Herculis
YY Herculis
YY Sagittarli - an Eclipsing Variable with Moving Line of Apsides
Yy-Canis - an Evolved Contact Binary System
Yy-Orionis Line Profiles in the Spectrum of Rw-Aurigae
YY-Orionis stars - an interesting group of the T-Tauri stars
YZ Andromedæ, Elements of, variation of
YZ Canis Minoris