Gryshchuk SV. Commutative сomplex algebras of the second rank with unity and some cases of the plane orthotropy. II. Ukr. Mat. Zhurn. [Internet]. 2018Oct.25 [cited 2024Nov.21];70(10):1382-9. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1642