Erickson, R.; Bentson, L.; Kharakh, D.; Owens, A.; Schuh, P.; Seeman, J. et al. SLAC Linac Preparations for FACET, article, February 7, 2011; (https://digital.library.unt.edu/ark:/67531/metadc834666/m1/3/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .