Tobias, M. L. & Steiner, D. Outline of direct methods used in computing the cross section sensitivity of neutronic parameters in a fusion reactor, report, June 1, 1973; (https://digital.library.unt.edu/ark:/67531/metadc1035702/m1/1/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .