TY  - JOUR
AU  - P. V. Roldugin
TI  - On the number of subsets of the residue ring such that the difference of any pair of elements is not invertible
JO  - Diskretnaya Matematika
PY  - 2016
SP  - 122
EP  - 138
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DM_2016_28_4_a9/
LA  - ru
ID  - DM_2016_28_4_a9
ER  -