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Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (2007). «Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations». Astronomische Nachrichten328 (9): 889. doi:10.1002/asna.200710776. Bibcode: 2007AN....328..889K.