Journal article (2000) - M Plazanet (author), MR Johnson (author), P Ordejón (author), A Garcia (author), JD Gale (author), T Yildirim (author), GJ Kearley (author), HP Trommsdorff (author), MT Fernandez-Diaz (author), D Sánchez-Portal (author), E Artacho (author), JM Soler (author)