TY  - JOUR
AU  - J. Ušan
TI  - Orthogonal systems of n-ary operations and codes
JO  - Matematički vesnik
PY  - 1978
SP  - 91 
VL  - 30
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/MV_1978_30_1_a12/
ID  - MV_1978_30_1_a12
ER  -