@article{Tarkhanov2011,
  author    = {Tarkhanov, Nikolai Nikolaevich},
  title     = {The dirichlet to Neumann operator for elliptic complexes},
  series = {Transactions of the American Mathematical Society},
  volume    = {363},
  journal   = {Transactions of the American Mathematical Society},
  number    = {12},
  publisher = {American Mathematical Soc.},
  address   = {Providence},
  issn      = {0002-9947},
  pages     = {6421 -- 6437},
  year      = {2011},
  abstract  = {We define the Dirichlet to Neumann operator for an elliptic complex of first order differential operators on a compact Riemannian manifold with boundary. Under reasonable conditions the Betti numbers of the complex prove to be completely determined by the Dirichlet to Neumann operator on the boundary.},
  language  = {en}
}