Lindström, Emil (December 16, 2015). "Emil möter: Theodor Forselius" [Emil meets: Theodor Forselius] (in Swedish). Emil Lindström. Archived from the original on January 7, 2018.
Sanger, Larry (October 18, 2019). "Introducing the Encyclosphere". larrysanger.org. Archived from the original on November 20, 2020. Retrieved December 28, 2020.
Lindström, Emil (December 16, 2015). "Emil möter: Theodor Forselius" [Emil meets: Theodor Forselius] (in Swedish). Emil Lindström. Archived from the original on January 7, 2018.
Sanger, Larry (October 18, 2019). "Introducing the Encyclosphere". larrysanger.org. Archived from the original on November 20, 2020. Retrieved December 28, 2020.