@article{bwmeta1.element.bwnjournal-article-fmv117i1p16bwm,
author = {Andreas Blass},
title = {Words, free algebras, and coequalizers},
journal = {Fundamenta Mathematicae},
volume = {115},
year = {1983},
pages = {117-160},
zbl = {0542.08005},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv117i1p16bwm}
}
Blass, Andreas. Words, free algebras, and coequalizers. Fundamenta Mathematicae, Tome 115 (1983) pp. 117-160. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv117i1p16bwm/