@article{01883721,
title = {Complexity of terms, composition, and hypersubstitution.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2003},
year = {2003},
pages = {959-969},
doi = {10.1155/S0161171203202118},
zbl = {1015.08005},
language = {en},
url = {http://dml.mathdoc.fr/item/01883721}
}
Denecke, Klaus; Wismath, Shelly L. Complexity of terms, composition, and hypersubstitution.. International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 959-969. doi : 10.1155/S0161171203202118. http://gdmltest.u-ga.fr/item/01883721/