1. LAPACK Users’ Guide, Release 3.0;Anderson,1999
2. More accurate bidiagonal reduction for computing the singular value decomposition;Barlow;SIAM J. Matrix Anal. Appl.,2002
3. One-dimensional Variational Problems;Buttazzo,1998
4. K.V. Fernando, Accurate BABE factorisation of tridiagonal matrices for eigenproblems, Technical Report TR5/95, Numerical Algorithms Group Ltd., Wilkinson House, Jordan Hill, Oxford OX2 8DR, 1995
5. Computing an eigenvector of a tridiagonal when the eigenvalue is known;Fernando;Z. Angew. Math. Mech.,1996