The electronic states of the system "epitaxial graphene—low dimensional structure" Z. Z. Alisultanov Institute of General Physics named after A. M. Prokhorov, RAS 38 Vavilov str., Moscow, 119991, Russia E-mail: zaur0102@gmail.com The electronic states of the "quantum dot—a monolayer of graphene—substrate SiO2+n+Si" in an external magnetic field are investigated. <...> An analytical expression obtained for the charge transfer in such a system. <...> The electronic states of the "quantum dot—a bilayer graphene—substrate SiO2+n+Si" are considered. <...> The study systems are interesting from the standpoint of controlling the optical properties of a quantum dot with an applied electric field. <...> The electronic states of the system "graphene nanotubes—quantum wire" are briefly touched upon. <...> PACS: 73.22.Pr, 73.21.La Keywords: monolayer graphene, bilayer graphene, quantum dots, electronic states, quantum wire. <...> Рассмотрены электронные состояния системы "квантовая точка—бислой графена—подложка Si02+n+Si". <...>