1960 20160701171656.0 ASTROimport-117 van Cauteren, P. 2004 Note on the short-period variability of V521 Cas in NGC 7789 Recent observations of V521 Cas in the open cluster NGC 7789 do not confirm that the star is a Delta Scuti variable (within the observational limits). Lampens, P. Pigulski, A. Communications in Asteroseismology 144 2004 23-25 http://esoads.eso.org/abs/2004CoAst.144...23V published in REFERD