Morozova, E. N., Gippius, A. A., Khozeev, D. F., Orlov, V. G., Shlikov, M. P., & Baenitz, M. (2003). Separation of quadrupole and magnetic mechanisms of 209 Bi nuclear spin-lattice relaxation in Bi4Ge3O12. Physica Status Solidi B-Basic Research, 236(2), 420-424. doi:10.1002/pssb.200301694.