- J. Engelfriet and G. Rozenberg. Fixed point languages, equality
languages, and representation of recursively enumerable languages.
Journal of the ACM, 27(3):499-518, July 1980.
Citations.
- A. Ehrenfeucht and G. Rozenberg. The sequence equivalence
problem is decidable for 0S systems. Journal of the
ACM, 27(4):656-663, October 1980.
- A. Ehrenfeucht, G. Rozenberg, and K. Ruohonen. A morphic representation of
complements of recursively enumerable sets. Journal of the
ACM, 28(4):706-714, October 1981.
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