Аnpilogova Vira, Svitlana Botvinovska, Alla Zolotova, and Hanna Sulimenko. “Study of the Problem on Constructing Quadrics at the Assigned Tangent Cones”. Eastern-European Journal of Enterprise Technologies 5, no. 1 (101) (October 16, 2019): 39–48. Accessed October 19, 2024. https://journals.uran.ua/eejet/article/view/180859.