Bryk, Taras     Pressure-induced emergence of unusually high-frequency transverse excitations in a liquid alkali metal: Evidence of two types of collective excitations contributing to the transverse dynamics at high pressures [Текст] / Taras Bryk, G. Ruocco, T. Scopigno, A.P. Seitsonen // Journal of chemical physics. — New York : American institute of physics, 2015. — № 10. — P. 104502:1-104502:11.