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Partially supported by the Batsheva de Rothschild Fund for the Advancement of Science and Technology.
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Fuhrmann, P.A. On realization of linear systems and applications to some questions of stability. Math. Systems Theory 8, 132–141 (1974). https://doi.org/10.1007/BF01762183
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DOI: https://doi.org/10.1007/BF01762183