I. Zachek, M. Karkuljevska, A. Vdovych, and R. Levitsky, “Influence of External Pressures of Different Symmetry on the Phase Transitions and Thermodynamic of the RbHSO4 Ferroelectrics”, Phys.Chem.Sol.State, vol. 16, no. 2, pp. 276–283, Jun. 2015.