M. D. Raransky, C. R. Tretiak, M. M. Gunko, and V. N. Balazyuk, “The Impact of d– and f–compression on Anisotropy of Elastic Properties of Single Crystals with Hexagonal Close Packing of Lattice”, Phys.Chem.Sol.State, vol. 17, no. 2, pp. 170–179, Jun. 2016.