Herman, Sarah (2012). Building a History: The Lego Group. Barnsley, South Yorkshire: Pen & Sword Books Ltd. Archived from the original on 27 February 2023. Retrieved 15 January 2021.
Robertson, David (2014). Brick by Brick: How LEGO Rewrote the Rules of Innovation and Conquered the Global Toy Industry. Random House Business. ASIN1847941176.
billundonline.dk
Thorø, Marianne (6 December 2018). "LEGO-løverne har forladt Billund". Billundonline.dk - Nyheden når den er ny - fra hele Billund kommune (in Danish). Retrieved 28 November 2023.
Herman, Sarah (2012). Building a History: The Lego Group. Barnsley, South Yorkshire: Pen & Sword Books Ltd. Archived from the original on 27 February 2023. Retrieved 15 January 2021.