James F. Lynch Complexity Classes and Theories of Finite Models. [Citation Graph (2, 0)][DBLP] Mathematical Systems Theory, 1982, v:15, n:2, pp:127-144 [Journal]
Yukata Yamamoto Realization Theory of Infinite-Dimensional Linear Systems. Part II. [Citation Graph (0, 0)][DBLP] Mathematical Systems Theory, 1982, v:15, n:2, pp:169-190 [Journal]
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