Fizika Tverdogo Tela, 1991 Volume 33, Issue 7,Pages 2006–2014(Mi ftt6943)
Point defects in, and low temperature behavior ($T < 15$ K) of the pyrocoefficient and of spontaneous polarization of $\mathrm{TGS},\mathrm{LiTaO}_{3}$ and $\mathrm{LiNbO}_{3}$