TY  - JOUR
AU  - Haimo, Franklin
TI  - Free subgroups in the endomorphism ring of an Abelian free group
JO  - Portugaliae mathematica
PY  - 1981
SP  - 393
EP  - 398
VL  - 40
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1981__40_4_115466/
LA  - en
ID  - PORMA_1981__40_4_115466
ER  -