Fleming, A. J., Coleman, J. N., Dalton, A. B., Fechtenkötter, A., Watson, M. D., Müllen, K., et al. (2003). Optical spectroscopy of isolated and aggregate hexabenzocoronene derivatives: A study of self-assembling molecular nanowires. The Journal of Physical Chemistry B, 107(1), 37-43. doi:10.1021/jp0262618.