1. AHO A. V. HOPCROFT J. E. AND ULLMAN J. D. 1975. The Design and Analysis of Computer Algorithms. Addison-Wesley Reading Mass. AHO A. V. HOPCROFT J. E. AND ULLMAN J. D. 1975. The Design and Analysis of Computer Algorithms. Addison-Wesley Reading Mass.
2. On the algebra of regular expressions;ANDERAA S.;Appl. Math.,1965
3. ARCHANGELSKY I<. V. 1992. A new finite complete solvable quasiequational calculus for algebra of regular languages. Manuscript Kiev State University. ARCHANGELSKY I<. V. 1992. A new finite complete solvable quasiequational calculus for algebra of regular languages. Manuscript Kiev State University.
4. BACKHOUSE R. C. 1975. Closure algorithms and the star-height problem of regular languages. Ph.D. thesis Imperial College London U.K. BACKHOUSE R. C. 1975. Closure algorithms and the star-height problem of regular languages. Ph.D. thesis Imperial College London U.K.
5. BERSTEL J. 1979. Transductions and Context-free Languages. Teubner Stuttgart Germany. BERSTEL J. 1979. Transductions and Context-free Languages. Teubner Stuttgart Germany.