Gelinck, G. H., Piet, J. J., Wegewijs, B. R., Müllen, K., Wildeman, J., Hadziioannou, G., et al. (2000). Measuring the Size of Excitations on Isolated Phenylene-Vinylene Chains: From Dimers to Polymers. Physical Review B, 62, 1489-1491.