McKeown, Joseph T.; Sugar, Joshua D.; Gronsky, Ronald & Glaeser,Andreas M. Processing of alumina-niobium interfaces via liquid-film-assistedjoining, article, February 15, 2005; (https://digital.library.unt.edu/ark:/67531/metadc873254/m1/1/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .