Geyer, M. Research Group Physical Biochemistry, Center of Advanced European Studies and Research (caesar), Max Planck Society;
http://pubs.acs.org/doi/pdfplus/10.1021/cr400071f (Any fulltext)
Eick, D., & Geyer, M. (2013). The RNA polymerase II carboxy-terminal domain (CTD) code. Chemical Reviews, 113(11), 8456-8490.