TY  - JOUR
AU  - Smith, D. H.
TI  - Perfect codes in the graphs Ok and L(Ok)
JO  - Glasgow mathematical journal
PY  - 1980
SP  - 169
EP  - 172
VL  - 21
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004328/
DO  - 10.1017/S0017089500004328
ID  - 10_1017_S0017089500004328
ER  -