Short description of important scientific result: Galeev A.I. GSC4813-0981 = V921 Mon, a new low-amplitude δ Scuti star with variable amplitude/ Galeev A., Bikmaev I., Shimansky V., Deminova N. // Putting A Stars into Context: Evolution, Environment, and Related Stars --in Proceedings of the international conference held on June 3-7, 2013 at Moscow M.V. Lomonosov State University in Moscow, Russia. Eds.: G. Mathys, E. Griffin, O. Kochukhov, R. Monier, G. Wahlgren -- Moscow: Publishing house "Pero", 2014, P. 295-300.