TY  - JOUR
AU  - T. Nordahl
TI  - Free products of normal bands.
JO  - Semigroup forum
PY  - 1977
SP  - 87
EP  - 88
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1977__15_134236/
ID  - SF_1977__15_134236
ER  -