1. Berrington, K.A., Burke, P.G., Le Dourneuf M, Robb, W.D., Taylor, K.T. and Vo Ky Lan, 1978, Comp. Phys. Commun. 14, 367.
2. Gourlay, A.R. and Watson, G.A., 1973, Computational methods for matrix eigenproblems. Wiley & Sons.
3. Householder, A.S. and Bauer, F.L., 1959, Numerische Math. 1 Band 1. Heft, p29.
4. Ralston, A. and Wilf, H.S., 1967, Mathematical methods for digital computers. II Wiley & Sons.
5. Sawey, M. and Berrington, K.A., 1989, Comp. Phys. Commun.: submitted.