Robert N. Moll, Michael A. Arbib, A. J. Kfoury. An Introduction to Formal Language Theory. Springer, 1988.
@book{MollAK88, title = {An Introduction to Formal Language Theory}, author = {Robert N. Moll and Michael A. Arbib and A. J. Kfoury}, year = {1988}, researchr = {https://researchr.org/publication/MollAK88}, cites = {0}, citedby = {0}, publisher = {Springer}, isbn = {0-387-96698-6}, }