Marko, František. “Towards Ankeny-Artin-Chowla Type Congruence Modulo p^3”. Annales Mathematicae Silesianae 20 (September 29, 2006): 31–55. Accessed May 7, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14067.