Drozd, Yu. A., and R. V. Skuratovskii. “Cubic Rings and Their Ideals”.
Ukrains’kyi Matematychnyi Zhurnal
62, no. 4 (April 25, 2010): 464–470. Accessed April 26, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/2880
.