Lamarche, Francois, and Helmut Ruhland. “Computed Multivalues of AGM Reveal Periodicities of Inverse Functions”. Computer Tools in Education, no. 3 (November 24, 2022): 64-81. Accessed April 26, 2024. http://cte.eltech.ru/ojs/index.php/kio/article/view/1758.