Square roots of real 2 x 2 matrices, article, November 2013; (https://digital.library.unt.edu/ark:/67531/metadc407868/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
Square roots of real 2 x 2 matrices, article, November 2013; (https://digital.library.unt.edu/ark:/67531/metadc407868/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .