Shurter, R.P.; Moir, D.C. & Devlin, D.J. Characterization of diamond film and bare metal photocathodes as a function of temperature and surface preparation, article, July 1, 1996; (https://digital.library.unt.edu/ark:/67531/metadc667849/m1/1/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .