TY  - JOUR
AU  - Hemdaoui, Mohammed
TI  - Letter to the editors
JO  - Mathematica Bohemica
PY  - 2015
VL  - 140
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.2015.144430/
DO  - 10.21136/MB.2015.144430
LA  - fr
ID  - 10_21136_MB_2015_144430
ER  -