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Introduction to languages and the theory of computation
Theory Of Computation - Text Book
Learning to Transform Natural to Formal Language Presented by Ping Zhang Rohit J. Kate, Yuk Wah Wong, and Raymond J. Mooney.
The Chomsky Hierarchy and Beyond Chapter 24. Is There Anything In Between PDAs and Turing Machines? PDAs aren’t powerful enough. Turing machines lack.
The Chomsky Hierarchy and Beyond
Theory of Automata Formal Languages
