@article{GDZPPN00125944X,
title = {Green's relations, the V relation and congruences on S(X).},
journal = {Semigroup forum},
volume = {37},
year = {1988},
pages = {313-324},
zbl = {0648.20062},
url = {http://dml.mathdoc.fr/item/GDZPPN00125944X}
}
Subbiah, S.; Magill, K.D. jr.; Barit, W. Green's relations, the V relation and congruences on S(X).. Semigroup forum, Tome 37 (1988) pp. 313-324. http://gdmltest.u-ga.fr/item/GDZPPN00125944X/