Brillouin spectroscopy of polarization fluctuations in Rb1-x(NH4)xH2PO4 mixed crystals: Concentration dependenceEric CourtensRené Vacheret al.1987Physical Review B
Brillouin spectroscopy of polarization fluctuations in a a Rb1-x(NH4)xH2PO4 glassEric CourtensRené Vacheret al.1986Physical Review B