J. Bals, G. Hofer, A. Pfeiffer, and C. Schallert, Virtual Iron Bird: A Multidisciplinary Modelling and Simulation Platform for new Aircraft System Architectures, In Deutscher Luftund Raumfahrtkongress, Friedrichshafen,
 A. Ben-Israel and T.N.E. Greville, Generalized Inverses: Theory and Applications, Springer-Verlag New York
 S.L. Campbell, P. Kunkel and V. Mehrmann, Regularization of Linear and Nonlinear Descriptor Systems, In L.
T. Biegler, S. L. Campbell, and V. Mehrmann, editors, Control and Optimization with Differential-Algebraic
Constraints, Advances in Control and Design, SIAM Publications, 2012.
 S.L. Campbell, Linearization of DAEs along trajectories, Z. Angew. Math. Phys. 46 (1995) 70–84.
 S.L. Campbell, C.D. Meyer and N.J. Rose, Application of the drazin inverse to linear systems of differential
equations with singular constant coefficients, SIMA J. Appl. Math. 31 (1976) 411–425.
 V.F. Chistyakov, Selected chapters of the theory of algebraic–differential systems, in Russian, Nauka, Moscow,
 L. Dai, Singular Control Systems, Lecture Notes in Control and Information Sciences, Springer Berlin., 1989.
 G. Denk, R. Winkler, Modelling and simulation of transient noise in circuit simulation, Int. J. Math. Comput.
Model. Dyn. Syst. 13 (2007) 383–394.
 E. Hairer and G. Wanner,Solving Ordinary Differential Equations II: Stiff and Differential Algebraic Problems,
Springer Series in Computational Mathematics, 2004.
 M. Hiller and K. Hirsch, Multibody system dynamics and mechatronics, Z. Angew. Math. Mech. 86 (2006) 87–109.
 A. Ilchmann and T. Reis, Surveys in differential-algebraic equations III, Springer-Verlag New York Inc., 2017.
 P. Kunkel and V. Mehrmann. Differential-Algebraic Equations. Analysis and Numerical Solution, EMS Publishing
House, Z¨urich, Switzerland, 2006.
 P. Kunkel and V. Mehrmann, Canonical forms for linear differential-algebraic equations with variable coefficients,
J. Comput. Appl. Math. 56 (1994) 225—259.
 R. Lamour, R. M¨arz and C. Tischendorf, Differential-algebraic equations: a projector based analysis, Springer
Science & Business Media, 2013.
 E. L. Lewis, A Survey of Linear Singular System, Circuits Proc. Int. Symp. Singular System, Atlanta, 1987.
 F. Magri, Variational formulation for every linear equation, Int. J. Eng. Sci. 12 (1974) 537–549.
 R. Marz, Numerical methods for differential-algebraic equations, Acta Numerica 1 (1992) 141—198.
 R. Marz, Differential-algebraic equation from a functional-analytic viewpoint, A Survey., 2013.
 V.K. Mishra and N.K. Tomar, On complete and strong controllability for rectangular descriptor systems, Circuits
Syst. Signal Proc. 35 (2016) 1395—1406.
 V.K. Mishra, N.K. Tomar and M.K. Gupta, On controllability and normalizability for linear descriptor systems,
J. Control Aut. Elect. Syst. 27 (2016) 19-–28.
 P. Rabier and W. Rheinboldt, Techniques of Scientific Computing (part 4)- Theoretical and Numerical Analysis
of Differential–Algebraic Equations, Handbook of Numerical Analysis, VIII, pp. 183–540. North Holland/Elsevier,
 R.K. Rektorys, Variational Methods in Mathematics, Science and Engineering, Reidel Pub. Company, London,
 G. Ren Duan, Analysis and Design of Descriptor Linear System, Springer, New York Dordrecht Heidelberg
 E. Tonti, Variational formulation of nonlinear differential equations, Bull. Acad. Roy. Belgique, 5 Serie, 137–165
(first part); 262-278 (second part), 1969.
 E. Zeidler, Applied Functional Analysis, Main Principles and Their Applications, Applied Mathematical Sciences
109, Springer-Verlag New York Inc., 1995.
 S.M. Zhuk, Closedness and normal solvability of an operator generated by a degenerate linear differential equation