Abramkin, D.; Bakarov, A.; Petrushkov, M.; Emelyanov, E.; Putyato, M.; Preobrazhensky, V.; Semyagin, B.; Yesin, M.; Kozhukhov, A.; Gutakovskii, A.; Shamirzaev, T. Novel Semiconductor Low-Dimensional Heterostructures: Formation, Crystal Structure and Energy Spectrum. Rec.Contr.Phys. 2018, 2018, 46-54.