@article{GDZPPN001263528,
title = {Hyperassociative varieties of semigroups.},
journal = {Semigroup forum},
volume = {48},
year = {1994},
pages = {41-48},
zbl = {0806.20049},
url = {http://dml.mathdoc.fr/item/GDZPPN001263528}
}
Denecke, K.; Koppitz, J. Hyperassociative varieties of semigroups.. Semigroup forum, Tome 48 (1994) pp. 41-48. http://gdmltest.u-ga.fr/item/GDZPPN001263528/