1. Relaxation Methods in Engineering;Southwell,1940
2. Tensor Analysis of Networks;Kron,1939
3. Structural Analysis by Electric Circuit Analogies;Bush;Journal Franklin Institute,1934
4. Equivalent Circuits I,;Starr;Transactions A. I. E. E.,1932
5. Kron “Equivalent Circuits of the Elastic Field,” Transactions A. S. M. E.