TY  - JOUR
AU  - Arto Salomaa
TI  - On a homomorphic characterization of recursively enumerable languages
JO  - Annales Fennici Mathematici
PY  - 1973
VL  - 521-560
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1973.525/
DO  - 10.5186/aasfm.1973.525
LA  - en
ID  - AFM_1973_521-560_a35
ER  -