1. H. Mark and J. Steinbach, Z. Kristallogr., Kristallgeom., Kristallphys., Kristallchem. 64, 78 (1926).
2. Proceedings of the Second International Symposium on Univalent Mercury Halides, Trutnov, Czechoslovak Federal Republic, 1989 (Trutnov, 1989)
3. A. A. Kaplyanskii, Yu. F. Markov, and Ch. Barta, Izv. Akad. Nauk SSSR, Ser. Fiz. 43, 1641 (1979).
4. C. Barta, A. A. Kaplyanskii, V. V. Kulakov, B. Z. Malkin, and Yu. F. Markov, Sov. Phys. JETP 43(4), 744 (1975).
5. M. B. Smirnov and V. Yu. Kazimirov, LADY: Software for Lattice Dynamics Simulations (Joint Institute for Nuclear Reseach Communications, No. E14-2001-159, 2001).