TY  - JOUR
AU  - Bernt Lindström
TI  - On Group and Nongroup Perfect Codes in q Symbols.
JO  - Mathematica Scandinavica
PY  - 1969
SP  - 149
EP  - 158
VL  - 25
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1969__25_166112/
ID  - MS2_1969__25_166112
ER  -