TY  - JOUR
AU  - Porubský, Štefan
TI  - On the density of certain sets in arithmetical semigroups
JO  - Czechoslovak Mathematical Journal
PY  - 1979
SP  - 148
EP  - 152
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1979.101588/
DO  - 10.21136/CMJ.1979.101588
LA  - en
ID  - 10_21136_CMJ_1979_101588
ER  -