A. Baran, I. Grygorchak, N. Tovstyuk, M. Klochko, E. Syrkin, S. Feodosyev, A. Feher, M. Kajňaková, M. Botko, and V. Fomenko, Low-temperature vibration characteristics in InSe single crystals intercalated by Ni, Low Temp. Phys. 41, (2015) [Fiz. Nizk. Temp. 41, 1191-1197, (2015)] DOI: https://doi.org/10.1063/1.4934548 .