Griffin, M., Shakespeare, S., Shepherd, H. J., Harding, C. J., Létard, J.-F., Desplanches, C., Goeta, A. E., Howard, J. A. K., Powell, A. K., Mereacre, V., Garcia, Y., Naik, A. D., Müller-Bunz, H., & Morgan, G. G. (2011). A symmetry-breaking spin-state transition in iron(III). Angewandte Chemie (International Edition), 50(4), 896-900. https://doi.org/10.1002/anie.201005545 (Original work published 2011)