@article{GDZPPN001265547,
title = {Amalgams of free inverse semigroups.},
journal = {Semigroup forum},
volume = {54},
year = {1997},
pages = {199-220},
zbl = {0872.20049},
url = {http://dml.mathdoc.fr/item/GDZPPN001265547}
}
Cherubini, A.; Meakin, J.; Piochi, B. Amalgams of free inverse semigroups.. Semigroup forum, Tome 54 (1997) pp. 199-220. http://gdmltest.u-ga.fr/item/GDZPPN001265547/