Tabujew, I., Freidel, C., Krieg, B., Helm, M., Koynov, K., Müllen, K., et al. (2014). The Guanidinium Group as a Key Part of Water-Soluble Polymer Carriers for siRNA Complexation and Protection against Degradation. Macromolecular Rapid Communications, 35(13), 1191-1197. doi:10.1002/marc.201400120.