 
                                                                                | Article ID: | iaor20127398 | 
| Volume: | 113 | 
| Issue: | 1-2 | 
| Start Page Number: | 4 | 
| End Page Number: | 7 | 
| Publication Date: | Jan 2013 | 
| Journal: | Information Processing Letters | 
| Authors: | Bonifaci Vincenzo | 
| Keywords: | biology | 
The purpose of this note is to give a short proof that a standard model for the