PetrovV.V., KryuchynA.A., GorbovI.V., PankratovaA.V., MankoD.Yu., BorodinYu.O., and ShikhovetsO.V. 2023. “Formation of Submicron Relief Structures on the Surface of Sapphire Substrates”. Physics and Chemistry of Solid State 24 (2), 298-303. https://doi.org/10.15330/pcss.24.2.298-303.