Gasparov, V. (2011). Surface and electron structure of the 6H-SiC(0001)-(3×3) surface and ultrathin Ag films on Si(111) and Si(001): Тонкие пленки. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 37(9-10), 1073–1084. https://doi.org/10.1063/1.3672008