| Article ID: | iaor20131382 |
| Volume: | 113 |
| Issue: | 5-6 |
| Start Page Number: | 156 |
| End Page Number: | 159 |
| Publication Date: | Mar 2013 |
| Journal: | Information Processing Letters |
| Authors: | Acerbi Luigi, Dennunzio Alberto, Formenti Enrico |
| Keywords: | combinatorial analysis |
A combinatorial proof that surjective