«Rolf Tibblin» (en anglès). motorcyclemuseum.org. AMA Motorcycle Hall of Fame. [Consulta: 8 gener 2020].
«Rolf Tibblin» (en anglès). motorcyclemuseum.org. AMA Motorcycle Hall of Fame. [Consulta: 8 gener 2020]. «The man who designed and made Tibblin's 1964 championship mount was Nils Hedlund. It was really the last great motocross machine before the two-strokes came flooding in. It took a strong, fit man to handle such a machine and Tibblin was the man to do it. He was the first person in motocross to take training seriously and I was privileged to know him and learn some of his methods. He was also a very humorous person, easy to get along with and always 'very, very, sorry' if he knocked you down!»
