@techreport{LamMT11b,
  author = {R. Lamour and R. M{\"a}rz and C. Tischendorf},
  title = {Projector based treatment of linear constant coefficient {DAE}s},
  institution = {Humboldt-University, Dep. of Mathematics},
  year = {2011},
  number = {11-15},
  url = {http://www2.mathematik.hu-berlin.de/publ/pre/2011/P-11-15.pdf},
}