}}
== Источники ==
Кузнецов О* [[wikipedia:Semi-Thue_system | Wikipedia {{---}} Semi-Thue system]]*[http://problem24.Пwordpress., Адельсонcom/2011/07/07/lecture-on-undecidability-7-the-word-problem-for-thue-systems Undecidability of the word problem for semi-Вельский Г.М. Дискретная математика для инженераThue systems ]
