@Article{TAC-16_Ferrante-Lanzon-Ntogramatzidis,
 author       = "Ferrante, A. and Lanzon, A. and Ntogramatzidis, L.",
 title        = "Foundations of not necessarily rational negative
                 imaginary systems theory: Relations between classes of negative
                 imaginary and positive real systems",
 journal      = "{IEEE} Transactions on Automatic Control",
 volume       = 61,
 number       = 10,
 pages        = "3052-3057",
 doi          = "10.1109/TAC.2015.2497461",
 month        = oct,
 year         = 2016}