Nowitzke, G., Wohlers, M., Braun, T., Schlögl, R., & Wortmann, G. (1997). Local Structure of Ru in Ru-C60 and Ru-Fullerene Black Compounds. Journal de Physique IV, 7(C2), C2-945-C2-946. doi:10.1051/jp4:1997294.