Klaus Aehlig, Jolie G. de Miranda, C.-H. Luke Ong. Safety Is not a Restriction at Level 2 for String Languages. In Vladimiro Sassone, editor, Foundations of Software Science and Computational Structures, 8th International Conference, FOSSACS 2005, Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2005, Edinburgh, UK, April 4-8, 2005, Proceedings. Volume 3441 of Lecture Notes in Computer Science, pages 490-504, Springer, 2005. [doi]
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