Zhao, P; Johnson, M R; Roberts, S K & Zavarin, M. Np and Pu Sorption to Manganese Oxide Minerals, report, August 30, 2005; (https://digital.library.unt.edu/ark:/67531/metadc892118/m1/1/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .