@article{GDZPPN001260693,
title = {Sch\"utzenberger groups of some even degree polynomials in S(R).},
journal = {Semigroup forum},
volume = {40},
year = {1990},
pages = {307-328},
zbl = {0704.20049},
url = {http://dml.mathdoc.fr/item/GDZPPN001260693}
}
Magill, K.D. jr.; Baird, B.B. Schützenberger groups of some even degree polynomials in S(R).. Semigroup forum, Tome 40 (1990) pp. 307-328. http://gdmltest.u-ga.fr/item/GDZPPN001260693/