Kuik, M., Wetzelaer, G. J. A. H., Nicolai, H. T., Craciun, N. I., de Leeuw, D. M., & Blom, P. W. M. (2014). 25th Anniversary Article: Charge Transport and Recombination in Polymer Light-Emitting Diodes. Advanced Materials, 26(4), 512-531. doi:10.1002/adma.201303393.