@article{01868880,
title = {Undecidable varieties with solvable word problems. III (a semigroup variety).},
journal = {Novi Sad Journal of Mathematics},
volume = {28},
year = {1998},
pages = {109-117},
zbl = {1006.08009},
language = {en},
url = {http://dml.mathdoc.fr/item/01868880}
}
Crvenković, Siniša; Dolinka, Igor. Undecidable varieties with solvable word problems. III (a semigroup variety).. Novi Sad Journal of Mathematics, Tome 28 (1998) pp. 109-117. http://gdmltest.u-ga.fr/item/01868880/