May, P. BioinformaticsCIG, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;
May, P., Kreuchwig, A., Steinke, T., & Koch, I. (2010). PTGL: a database for secondary structure-based protein topologies. Nucleic Acids Research, 38(Database issue), D326-D330. doi:10.1093/nar/gkp980.