Harnchoowong A, Somboonkulavudi C. A Ring of Pythagorean Triples over Quadratic Fields. Ukr. Mat. Zhurn. [Internet]. 2014Jan.25 [cited 2024Nov.22];66(1):135–139. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2117