@Inproceedings{aucc-11_Mabrok-Kallapur-Petersen-Lanzon,
 author       = "Mabrok, M. A. and Kallapur, A. G. and Petersen, I. R. and Lanzon, A.",
 title        = "A negative imaginary lemma for descriptor systems",
 address      = "Melbourne, Australia",
 booktitle    = "Proceedings of the 2011 Australian Control Conference",
 pages        = "543-546",
 month        = nov,
 year         = 2011}