@article{AliBGT03,
  author = {G. Al{\'i} and A. Bartel and M. G{\"u}nther and C. Tischendorf},
  title = {Elliptic Partial Differential--Algebraic Multiphysics Models in Electrical
	Network Design},
  journal = {Math. Models Meth. Appl. Sci.},
  year = {2003},
  volume = {13},
  pages = {1261-1278},
  number = {9},
  doi = {10.1142/S0218202503002908}
}