Griffith, R; Milam, D; Sell, W & Thompson, C. Measurements at 351 nm of temporal dispersion in fibers, report, November 4, 1998; (https://digital.library.unt.edu/ark:/67531/metadc738822/m1/1/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .