@article{GDZPPN001250272,
title = {Compatible extensions and subdirectly irreducible inverse semigroups.},
journal = {Semigroup forum},
volume = {7},
year = {1974},
pages = {241-252},
zbl = {0292.20057},
url = {http://dml.mathdoc.fr/item/GDZPPN001250272}
}
Zitarelli, D.E. Compatible extensions and subdirectly irreducible inverse semigroups.. Semigroup forum, Tome 7 (1974) pp. 241-252. http://gdmltest.u-ga.fr/item/GDZPPN001250272/