Butler, S. J., McMahon, B. K., Pal, R., Parker, D., & Walton, J. W. (2013). Bright Mono-aqua Europium Complexes Based on Triazacyclononane That Bind Anions Reversibly and Permeate Cells Efficiently. Chemistry - A European Journal, 19(29), 9511-9517. https://doi.org/10.1002/chem.201301273