John Harrison. Morphic Congruences and D0L Languages. Theoretical Computer Science, 134(2):537-544, 1994.
@article{Harrison94:2,
title = {Morphic Congruences and D0L Languages},
author = {John Harrison},
year = {1994},
researchr = {https://researchr.org/publication/Harrison94%3A2},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {134},
number = {2},
pages = {537-544},
}