Osinski, P., Poupaert, J., Gallez, B., Adline, J., & Dumont, P. (1989). Stoichiometric Complexes Tin-methylenediphosphonate - Composition, Biodistribution and Elements of Structure. Journal of Labelled Compounds and Radiopharmaceuticals, 27(5), 515-531. https://doi.org/10.1002/jlcr.2580270505 (Original work published 1989)