Abrahams, S.C; Bernstein, J.L (1967). "Ferroelectric lithium tantalate—1. Single crystal X-ray diffraction study at 24°C". Journal of Physics and Chemistry of Solids28 (9): 1685. doi:10.1016/0022-3697(67)90142-4. Bibcode: 1967JPCS...28.1685A.
Abrahams, S.C; Bernstein, J.L (1967). "Ferroelectric lithium tantalate—1. Single crystal X-ray diffraction study at 24°C". Journal of Physics and Chemistry of Solids28 (9): 1685. doi:10.1016/0022-3697(67)90142-4. Bibcode: 1967JPCS...28.1685A.