The+clause+compromise+with+the+which are+referred to+to+referees+le+controversies+on the interpretation+or+on the execution+of the+contract+which it+it accesses,+in+lack+express+will+will+contrary,+ascrive+at+competence+referee+only+the+disputes +that+si+refer+to+claims+with+the+cause+petendi+in the contract+itself,+having to be+to exclude+that+between these+controversies+can+be+included+the+causes+liability+non -contractual,+which have+in the+contract+only+a+assumption+of+fact.