Physical Review B - Condensed Matter and Materials Physics, 84-11, 2011 doi:10.1103/PhysRevB.84.115401
Knox Kevin R., Locatelli Andrea, Yilmaz Mehmet B., Cvetko Dean, Menteş Tevfik Onur, Niño Miguel Ángel, Kim Philip, Morgante Alberto, Osgood Richard M.