Dabirian, R., Feng, X., Ortolani, L., Liscio, A., Morandi, V., Müllen, K., Samori, P., & Palermo, V. (2010). Micron-sized [6,6]-phenyl C61 butyric acid methyl ester crystals grown by dip coating in solvent vapour atmosphere: interfaces for organic photovoltaics. Physical Chemistry Chemical Physics, 12(17), 4473-4480.