1. (a) M. Tsuji, S. Kuboyama, T. Matsuzaki, T. Tsuji, Carbon 41, 2141 (2003);
2. (b) M. Tsuji, S. Kuboyama, T. Tsuji, in Polyynes: Synthesis, Properties and Applications, ed. by F. Cataldo (Taylor & Francis Publishing House, CRC Press, Boca Raton, Florida, 2005), Chap. 7
3. H. Tabata, M. Fuji, S. Hayashi, Carbon 44, 22 (2006)
4. (a) F. Cataldo, Carbon 42, 129 (2004).
5. (b) F. Cataldo, Carbon 41, 2671 (2003)