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2007, ISBN 0521232538, Volume 9780521232531, xxi, 350
This book was first published in 2007. Variable stars are those that change brightness... 
Variable stars | Physics
Book
Astrophysical Journal, ISSN 0004-637X, 01/2017, Volume 835, Issue 1
Journal Article
Monthly notices of the Royal Astronomical Society, ISSN 1365-2966, 2016, Volume 457, Issue 3, pp. 3163 - 3177
Journal Article
2007, 2nd ed., ISBN 9780521857147, xviii, 339
.... This fully updated second edition incorporates new material on binary stars, black holes, gamma-ray bursts, worm-holes, quantum gravity and string theory... 
Hyperspace | Supernovae | Stars | Black holes (Astronomy)
Book
2015, ISBN 3527407154, 487
This book surveys our understanding of stars which change in brightness because they pulsate... 
Astronomy, Space & Time | Pulsating stars
eBook