Solid-phase production of carbon nanotubes. - Hsu, W.K.; Zhu, Y.Q.; Trasobares, S.; Terrones, H.; Terrones, M.; Grobert, N.; Takikawa, H.; Hare, J.P.; Kroto, H.W.; Walton, D.R.M. (Applied Physics A: Materials Science & Processing, 1999)