Polymeric gadolinium chelate magnetic resonance imaging contrast agents: design, synthesis, and properties,
Ladd, D. L., Hollister R., Peng X., Wei D., Wu G., Delecki D., Snow R. A., Toner J. L., Kellar K., Eck J., et al.
, Bioconjug Chem, May-Jun, Volume 10, Number 3, p.361-70, (1999)