TY  - JOUR
AU  - Olof Heden
TI  - A generalized Lloyd theorem and mixed perfect codes.
JO  - Mathematica Scandinavica
PY  - 1975
SP  - 13
EP  - 26
VL  - 37
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1975__37_166422/
ID  - MS2_1975__37_166422
ER  -