R.  Cartwright, Esconjauregui, S., Hardeman, D., Bhardwaj, S., Weatherup, R., Guo, Y., D'Arsie, L., Bayer, B., Kidambi, P., Hofmann, S., Wright, E., Clarke, J., Oakes, D., Cepek, C., and Robertson, J., ?Low temperature growth of carbon nanotubes on tetrahedral amorphous carbon using Fe-Cu catalyst?, Carbon, vol. 81, pp. 639-649, 2015.