1. Saito T, Hamane DN, Yoshii S, Nojima T (2011) Appl Phys Lett 98:052506–3
2. Makarova T, Palacio F (2006) Carbon based magnetism: an overview of the magnetism of metal free carbon-based compounds and materials. Elsevier, Amsterdam
3. Esquinazi P, Spemann D, Höhne R, Setzer A, Han KH, Butz T (2003) Phys Rev Lett 91:227201–4
4. Peng C, Liang Y, Wang K, Zhang Y, Zhao G, Wang Y (2012) J Phys Chem C 116:9709–15
5. Bandaru PR, Park J, Lee JS, Tang YJ, Chen L-H, Jin S, Song SA, Brien JRO (2006) Appl Phy Lett 89:112502–3