M. Atiyah and I. Macdonald, Introduction to Commutative Algebra, 1994.

F. Bejarano, W. Perruquetti, T. Floquet, and G. Zheng, Observability and detectability of singular linear systems with unknown inputs, Automatica, vol.49, issue.3, pp.793-800, 2013.
DOI : 10.1016/j.automatica.2012.11.043

URL : https://hal.archives-ouvertes.fr/hal-00753706

F. Bejarano and G. Zheng, Observability of linear systems with commensurate delays and unknown inputs, Automatica, vol.50, issue.8, pp.2077-2083, 2014.
DOI : 10.1016/j.automatica.2014.05.032

URL : https://hal.archives-ouvertes.fr/hal-00967944

S. Campbell, Singular Systems of Differential Equations Research notes in mathematics, 1980.

D. Cobb, Controllability, observability, and duality in singular systems, IEEE Transactions on Automatic Control, vol.29, issue.12, pp.1076-1082, 1984.
DOI : 10.1109/TAC.1984.1103451

D. Cobb, State Feedback Impulse Elimination for Singular Systems over a Hermite Domain, SIAM Journal on Control and Optimization, vol.44, issue.6, pp.2189-2209, 2006.
DOI : 10.1137/040618515

URL : http://www.ece.wisc.edu/~cobb/papers/SICON6(2).pdf

M. Delfour and S. Mitter, Controllability, Observability and Optimal Feedback Control of Affine Hereditary Differential Systems, SIAM Journal on Control, vol.10, issue.2, pp.298-328, 1972.
DOI : 10.1137/0310023

M. Ezzine, M. Darouach, H. Souley-ali, and H. Messaoud, Unknown inputs functional observers designs for delay descriptor systems, International Journal of Control, vol.36, issue.10, pp.1850-1858, 2013.
DOI : 10.1080/002071797224612

URL : https://hal.archives-ouvertes.fr/hal-00915576

Z. Gu, H. Su, P. Shi, and J. Chu, Analysis and Synthesis of Singular Systems with Time-Delays. Lecture notes in control and information science, 2013.

M. Hou and P. Müller, Causal observability of descriptor systems, IEEE Transactions on Automatic Control, vol.44, issue.1, pp.158-163, 1999.
DOI : 10.1109/9.739111

E. Kamen, Mathematical System Theory Linear systems over rings: from R. E. Kalman to the present, pp.31-324, 1991.

E. Lee and A. Olbrot, Observability and related structural results for linear hereditary systems???, International Journal of Control, vol.6, issue.6, pp.1061-1078, 1981.
DOI : 10.1137/0319011

A. Perdon and M. Anderlucci, An Unknown Input Observer for Singular Time-Delay Systems, 2006 14th Mediterranean Conference on Control and Automation, pp.1-6, 2006.
DOI : 10.1109/MED.2006.328796

H. Wang, Consensus of Networked Mechanical Systems With Communication Delays: A Unified Framework, IEEE Transactions on Automatic Control, vol.59, issue.6, pp.1571-1576, 2014.
DOI : 10.1109/TAC.2013.2293413

J. Wang, Z. Duan, G. Wen, and G. Chen, Leader-following consensus of networked second-order agents with delayed information transmission, IET Control Theory & Applications, vol.8, issue.14, pp.1421-1428, 2014.
DOI : 10.1049/iet-cta.2013.1109

G. Wei, General Solution and Observability of Singular Differential Systems with Delay, Abstract and Applied Analysis, vol.49, issue.5, p.10, 2013.
DOI : 10.1016/j.camwa.2009.07.010

URL : http://doi.org/10.1155/2013/512465

E. Yip and R. Sincovec, Solvability, controllability, and observability of continuous descriptor systems, IEEE Transactions on Automatic Control, vol.26, issue.3, pp.702-707, 1981.
DOI : 10.1109/TAC.1981.1102699