Mamedov, I., Mishra, A., Angelovski, G., Mayer HA, L-O, Parker, D., & Logothetis, N. (2007). Synthesis and Characterization of Lanthanide Complexes of DO3A-Alkylphosphonates. Dalton Transactions, 45, 5260-5267. doi:10.1039/b711351j.