2015閲覧。 ^ “Jay Z's music-streaming serviceTidal sells 33% stake to Sprint”. VentureBeat. January 23, 2017閲覧。 ^ “Tidal launches in five more European countries”
Galactic Halo Astronomy Abstract Service ^ A New Giant Stellar Structure in the Outer Halo of M31 arXiv ^ a b New tidal streams found in Andromeda reveal