Walker, J. K. Cerium oxide coated anodes for aluminum electrowinning: Topical report, October 1, 1986-June 30, 1987, report, December 1, 1987; (https://digital.library.unt.edu/ark:/67531/metadc1092946/m1/1/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .