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Spectral factorization of a spectral density with arbitrary delays

Bibliographic reference Callier, Frank ; Winkin, Joseph ; Blondel, V. D ; Sontag, E. D ; Vidyasagar, M ; et. al. Spectral factorization of a spectral density with arbitrary delays. In: Open problems in mathematical systems and control theory : , Springer Verlag  : London 1999, p. 79-82
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