TY  - JOUR
AU  - Aimo Tietäväinen
TI  - On the nonexistence of perfect 4-Hamming-error-correcting codes
JO  - Annales Fennici Mathematici
PY  - 1971
VL  - 471-500
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1971.485/
DO  - 10.5186/aasfm.1971.485
LA  - en
ID  - AFM_1971_471-500_a15
ER  -