1. Numerical inverting of matrices of high order;von Neumann, John;Bull. Amer. Math. Soc.,1947
2. Some new methods in matrix calculation;Hotelling, Harold;Ann. Math. Statistics,1943
3. Recent developments in correlation technique;Dwyer, Paul S.;J. Amer. Statist. Assoc.,1942
4. Comparison of some direct methods for computing determinants and inverse matrices;Bodewig, E.;Nederl. Akad. Wetensch., Proc.,1947
5. A contribution to the method of least squares;Herzberger, M.;Quart. Appl. Math.,1947