Comparison of methods to determine point-to-point resistance in nearly   rectangular networks with application to a hammock network
  Considerable progress has recently been made in the development of techniques to exactly determine two-point resistances in networks of various topologies. In particular, two types of method have emerged. One is based on potentials and the evaluation of eigenvalues and eigenvectors of the Laplacian matrix associated with the network or its minors. The second method is based on a recurrence relation associated with the distribution of currents in the network. Here, these methods are compared and used to determine the resistance distances between any two nodes of a network with topology of a hammock. 
John W. Essam, Nikolay Sh. Izmailyan, Ralph Kenna and Zhi-Zhong Tan
math-ph math.MP