Since today a template is available for the German Wikipedia to add web link entries refering to the professor's catalogue. The following example shows the use of the template: After the signal word “CPL″ the unique Professoren-ID has to be added, for example, for Prof. Dr. phil. Theodor Litt (ID: “Litt_96"): {{CPL|Litt_96}} The following link shows a list of all professors thus are refering to the template: http://de.wikipedia.org/wiki/Spezial:Linkliste/Vorlage:CPL.