1. Limits for the characteristic roots of a matrix;Brauer;Duke Math. Jour.,1946
2. Numerical determination of fundamental modes;Flanders;J. App. Phys.,1950
3. Methods of conjugate gradients for solving linear systems;Hestenes;Journal of Research,1952
4. On an effective method of solving extremal problems for quadratic functionals;Kantorovich;Comptes Rendus (Doklady) de l'Academie des Sciences de L'URSS,1945
5. Über Polynome, die in einem gegeben Intervalle miJglichst wenig von Null abweichen;Markoff;Math. Ann.,1916