no. 4
On the equality sets for homomorphisms on free monoids with two generators
RAIRO. Informatique théorique, Tome 14 (1980) no. 4, pp. 349-369 
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     author = {Culik II, K. and Karhum\"aki, J.},
     title = {On the equality sets for homomorphisms on free monoids with two generators},
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     pages = {349--369},
     year = {1980},
     publisher = {EDP Sciences},
     volume = {14},
     number = {4},
     mrnumber = {607436},
     zbl = {0454.20048},
     language = {en},
     url = {https://www.numdam.org/item/ITA_1980__14_4_349_0/}
}
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Culik II, K.; Karhumäki, J. On the equality sets for homomorphisms on free monoids with two generators. RAIRO. Informatique théorique, Tome 14 (1980) no. 4, pp. 349-369. https://www.numdam.org/item/ITA_1980__14_4_349_0/

1. K. Culik Ii, A Purely Homomorphic Characterization of Recurively Enumerable Sets, J. Assoc. Comput. Mach., Vol. 26, 1979, pp. 345-350. | Zbl | MR

2. K. Culik Ii, On Homomorphic Characterization of Families of Languages. Proceedings of the Six Inter. Colloquium an Automata, Languages and Programrning, Graz, Austria, pp. 161-170, July 1979. | Zbl | MR

3. K. Culik Ii and I. Fris, The Decidability of the Equivalence Problem for DOL Systems, Inf. and Control, Vol. 35, 1977, pp.20-39. | Zbl | MR

4. K. Culik Ii and A. Salomaa, On the Decidability of Homomorphism Equivalence for Languages, J. Comp. System Sc., Vol. 17, 1978, pp.163-175. | Zbl | MR

5. K. Culik Ii and A. Salomaa, Test Sets and Checking words for Homomorphism Equivalence, J. Comp. System Sc., Vol. 20, 1980, pp. 379-395. | Zbl | MR

6. K. Culik Ii and H. A. Maurer, On Simple Representations of Language Families, R.A.I.R.O., Informatique théorique/Theoretical Informatics, Vol. 13, No. 3, 1979, pp. 241-250. | Zbl | MR | Numdam

7. A. Ehrenfeucht and G. Rozenberg, Elementary Homomorphisms and a Solution to the DOL Sequence Equivalence Problem, Theoretical Computer Science, Vol. 7, 1978, pp. 169-183. | Zbl | MR

8. J. Engelfriet and G. Rozenberg, Equality Languages and Fixed Point Languages, Inf. and Control, Vol. 43, 1979, pp. 20-49. | Zbl | MR

9. J. Karhumaki and I. Simon, A Note on Elementary Homomorphisms and the Regularity of Equality Sets, Bulletin E.A.T.C.S., No, 9, October 1979, pp. 16-24,

10. R. C. Lyndon and M. P. Schutzenberger, The Equation aM=bN cP in a Free Group, Michigan Math. J., Vol.9, 1962, pp. 289-298. | Zbl | MR

11. G. S. Makanin, The Problem of Solvability of Equations in a Free Semigroup (in Russian), Matematiceskij Sbornik, Vol. 103, No. 145, 1977, pp. 148-236. | Zbl | MR

12. A. Salomaa, Equality Sets for Homomorphisms of Free Monoids, Acta Cybernetica, Vol. 4, 1978, pp.127-139. | Zbl | MR

13. A. Salomaa, DOL Equivalence: The Problem of Iterated Morphisms, Bulletin E.A.T.C.S., No. 4, January 1978, pp. 5-12