N. S. Lutsenko, O. V. Krasnozhan, and N. F. Efimenko, “Preoperative serum 25-hydroxycalciferol levels in Kherson-region patients with cataract only, cataract plus glaucoma or cataract plus high myopia”, J.ophthalmol. (Ukraine), no. 3, pp. 15–22, Sep. 2025.