Raman scattering investigation and symmetry analysis of ferroelectric/ferroelastic Sb5O7I polytype 2MAW. PrettlK.H. Riederet al.1979Zeitschrift für Physik B Condensed Matter and QuantaPaper
Raman scattering study and symmetry aspects of the phase transition in ferroelastic Sb5o7IW. PrettlK.H. Rieder1976Physical Review BPaper