Hey thanks a lot for your reply and sorry for Ok!! I solved it! all the very late response.. because of problems I wasn't able to get connected. Well, the database is built under LibreOffice 4.2.8.2 and the os is Fedora 20, kernel: 3.17.8-200. the target pc is my laptop which has the same features. Is it possible to transfer it?files, are stored at ~/.config/libreoffice
In this directory, if we go further at 4/user/database/biblio.odb we can see the whole bibliography database :)