@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} }