1. Biggs, N. L., Lloyd, E. K., and Wilson, R. J.,Graph Theory: 1736–1936, Oxford University Press, Oxford, 1976.
2. Seshu, S. and Reed, M. B.,Linear Graphs and Electrical Networks, Addison-Wesley, London, 1961.
3. Busacker, R. G. and Saaty, T. L.,Finite Graphs and Networks: An Introduction with Applications, McGraw-Hill, New York, 1965.
4. Koenig, H. E., Tokad, Y., and Kesavan, H. K.,Analysis of Discrete Physical Systems, McGraw-Hill, New York, 1967.
5. Trent, H. M., ‘Isomorphisms between oriented linear graphs and lumped physical systems’,Journal of the Acoustic Society of America 27, 1955, 500–527.