@article{GDZPPN001258893,
title = {Regular involution groupoids revisited.},
journal = {Semigroup forum},
volume = {33},
year = {1986},
pages = {353-368},
zbl = {0624.20038},
url = {http://dml.mathdoc.fr/item/GDZPPN001258893}
}
Krishnan, V.S.; Levitan, M. Regular involution groupoids revisited.. Semigroup forum, Tome 33 (1986) pp. 353-368. http://gdmltest.u-ga.fr/item/GDZPPN001258893/