Hsueh, H., Vass, H., Clark, S., & Crain, J. (1995). BREAKDOWN OF RIGID-UNIT VIBRATIONS IN LAYERED SEMICONDUCTORS UNDER PRESSURE - APPLICATION TO GERMANIUM SULFIDE (VOL 31, PG 151, 1995). European Physical Society Letters, 31(8), https://doi.org/10.1209/0295-5075/31/8/c01