Geodesic
Some Things Some Functions May Be, Some Others Can't Be
Séminaire lotharingien de combinatoire, Tome 10 (1984) 
Wolfgang Degen; Klaus Leeb; Giuseppe Pirillo; Helmut Sperber. Some Things Some Functions May Be, Some Others Can't Be. Séminaire lotharingien de combinatoire, Tome 10 (1984). http://geodesic.mathdoc.fr/item/SLC_1984_10_a13/
@article{SLC_1984_10_a13,
     author = {Wolfgang Degen and Klaus Leeb and Giuseppe Pirillo and Helmut Sperber},
     title = {Some {Things} {Some} {Functions} {May} {Be,} {Some} {Others} {Can't} {Be}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1984},
     volume = {10},
     url = {http://geodesic.mathdoc.fr/item/SLC_1984_10_a13/}
}
TY  - JOUR
AU  - Wolfgang Degen
AU  - Klaus Leeb
AU  - Giuseppe Pirillo
AU  - Helmut Sperber
TI  - Some Things Some Functions May Be, Some Others Can't Be
JO  - Séminaire lotharingien de combinatoire
PY  - 1984
VL  - 10
UR  - http://geodesic.mathdoc.fr/item/SLC_1984_10_a13/
ID  - SLC_1984_10_a13
ER  - 
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%A Klaus Leeb
%A Giuseppe Pirillo
%A Helmut Sperber
%T Some Things Some Functions May Be, Some Others Can't Be
%J Séminaire lotharingien de combinatoire
%D 1984
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%U http://geodesic.mathdoc.fr/item/SLC_1984_10_a13/
%F SLC_1984_10_a13

Voir la notice de l'acte provenant de la source Séminaire Lotharingien de Combinatoire website

We discuss a conjecture on the decomposition of a function from a given finite set to itself.