@Article{TAC-08_Lanzon-Petersen,
 author       = "Lanzon, A. and Petersen, I. R.",
 title        = "Stability robustness of a feedback interconnection of systems with
                 negative imaginary frequency response",
 journal      = "{IEEE} Transactions on Automatic Control",
 volume       = 53,
 number       = 4,
 pages        = "1042-1046",
 doi          = "10.1109/tac.2008.919567",
 month        = may,
 year         = 2008}