Fastrez, J., & Daffe, V. (1981). A Proton Nuclear Magnetic-resonance Investigation of the Protonation of Bis(ethylenediamine)glycinatocobalt(iii) in Strongly Acidic Media. Dalton Transactions, 1, 317-318. https://doi.org/10.1039/dt9810000317 (Original work published 1981)