@book{LamMT13,
  title = {Differential-algebraic equations: {A} projector based analysis.},
  publisher = {Differential-Algebraic Equations Forum 1. Berlin: Springer},
  year = {2013},
  author = {R. Lamour and R. M{\"a}rz and C. Tischendorf},
  doi = {10.1007/978-3-642-27555-5}
}