The+clause+compromising+that+provides+the+appointment+of the+third+referee+by+agreement+of the+parts+not+is+affection+from+nullity,+to+senses+of art.+809+cod.+Proc.+Civ.,+Per+failure+determination+of the+modes of+nomination+such+referee,+keen+account+nom+nom ina+itself+not+is+impossible+implementation+practice,+because,+in+defect+of+agreement,+application+analog+art.+810+cod.+proc.+civ.,+with+consequent chances+the+parts+parts+ask+that it is+it is carried out+by the+president+of the+court.