Reiner Kolla, Bernd Serf The Virtual Feedback Problem in Hierarchical Representations of Combinational Circuits. [Citation Graph (0, 0)][DBLP] Acta Inf., 1991, v:28, n:5, pp:463-476 [Journal]
Friedrich Otto, Louxin Zhang Decision Problems for Finite Special String-Rewriting Systems that are Confluent on Some Congruence Class. [Citation Graph (0, 0)][DBLP] Acta Inf., 1991, v:28, n:5, pp:477- [Journal]
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