1. "Tensor Analysis of Networks " by G. Kron John Wiley and Sons Inc. New York 1939.
2. "Matrix Methods of Analysis Applied to Wing Structures " by V. P. Jensen Douglas Aircraft Co. Report E. S. 6480 January 1944.
3. Computation of Influence Coefficients for Aircraft Structures with Discontinuities and Sweepback," by S. Levy;Journal of the Aeronautical Sciences,1947
4. The Partitioning of Matrices in Structural Analysis," by S. U. Benscoter;Journal of Applied Mechanics,1948
5. "Le Calcul Systematique des Caracteristiques Elastiques des Systemes Hyperstatiques " by H. Falkenheiner La Recherche Aeronautique No. 17 France September-October 1950.