TY  - JOUR
AU  - Leonard Y.H. Yap
TI  - On the Impossibility of Representing Certain Functions by Convolutions.
JO  - Mathematica Scandinavica
PY  - 1970
SP  - 132
EP  - 140
VL  - 26
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1970__26_166131/
ID  - MS2_1970__26_166131
ER  -