15 apr 2011
- 15:2715:27, 15 apr 2011 diff cron −153 Albert Einstein →Einstein filosofo
- 15:2315:23, 15 apr 2011 diff cron +153 Albert Einstein →Einstein filosofo
- 15:1915:19, 15 apr 2011 diff cron −81 Assioma (matematica) →Ulteriori considerazioni
- 15:1515:15, 15 apr 2011 diff cron +81 Assioma (matematica) →Ulteriori considerazioni