Matsekh, A. M. (Anna M.). The Godunov-Inverse Iteration : A fast and accurate solution to the symmetric tridiagonal eigenvalue problem., article, November 27, 2002; (https://digital.library.unt.edu/ark:/67531/metadc926775/m1/1/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .