Fehst

(KI)1-x(NH4I)x: A dipolar glass.

Ott, Boehmer, Loidl, 1990, Physical review letters.

Proton glass behavior and hopping conductivity in solid solutions of antiferroelectric betaine phosphate and ferroelectric betaine phosphite.

Mertz, Boehmer, Braune, 1991, Physical review letters.