Bernacki, B.E.; Miller, A.C. Jr.; Evans, B.M. III; Moreshead, W.V. & Nogues, J.L.R. Sol-gel replicated optics made from single point diamond turned masters exhibit fractal surface roughness, article, May 1, 1996; (https://digital.library.unt.edu/ark:/67531/metadc669212/m1/1/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .