Debuyst, R., Dejehet, F., Gorllerwalrand, C., & Vanquickenborne, L. (1980). On the Eigenvectors of the G-tensors and A-tensors of Copper(ii) Substituted in Sites of Low Symmetry. Inorganica Chimica Acta, 40(2), X121-X121. https://doi.org/10.1016/S0020-1693(00)92222-9 (Original work published 1980)