1.
Vyhovs’kaIY, Zelinskii YB. Criterion for convexity of a domain of a Euclidean space. Ukr. Mat. Zhurn. [Internet]. 2008May25 [cited 2024Nov.23];60(5):709–711. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3189