An author is any person who publishes a work attributed to himself by mentioning his name on the work or by any other means used to attribute works to their authors, unless there is evidence to the contrary.
The publisher whose name appears on the work shall be the representative of the author, if the work is published under a pseudonym or anonymously.
When two or more persons collectively participate in the authorship of a work in such a manner that their contributions to the collective work can be separated, each party shall have the right to individually exploit his part, provided that no damage is caused to the exploitation of the collective work, unless otherwise agreed.