Art. 67 Abs. 4 O.G.; written appeal procedure and requirement of a reasoned brief within the appeal period. Where the written appellate procedure applies, the appeal declaration is only effective if accompanied, within the statutory deadline, by a brief setting out the grounds of challenge. A mere reference to the file or an unparticularized criticism of the judgment does not replace the required reasoning. The brief is a formal element of the appeal and cannot be filed later to cure the defect; otherwise the written procedure cannot be opened by communication to the opposing party for response (consid. 1).