%0 Journal Article %A F. Pastijn %A K.S.S. Nambooripad %T Subgroups of free idempotent generated regular semigroups. %J Semigroup forum %D 1980 %P 1-8 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1980__21_134431/ %F SF_1980__21_134431