@article{GDZPPN001249029,
title = {A study of operands in terms of maximal generalized orbits.},
journal = {Semigroup forum},
volume = {7},
year = {1974},
pages = {69-74},
zbl = {0256.20092},
url = {http://dml.mathdoc.fr/item/GDZPPN001249029}
}
Nico, W.R. A study of operands in terms of maximal generalized orbits.. Semigroup forum, Tome 7 (1974) pp. 69-74. http://gdmltest.u-ga.fr/item/GDZPPN001249029/