Analysis of information sources in references of the Wikipedia article "Ρόλαντ Γκράποφ" in Greek language version.
|archiveurl= και |archive-url= specified (βοήθεια); More than one of |archivedate= και |archive-date= specified (βοήθεια); More than one of |accessdate= και |access-date= specified (βοήθεια)|archiveurl= και |archive-url= specified (βοήθεια); More than one of |archivedate= και |archive-date= specified (βοήθεια); More than one of |accessdate= και |access-date= specified (βοήθεια)