Lutsenko, N. S., et al. “Preoperative Serum 25-Hydroxycalciferol Levels in Kherson-Region Patients With Cataract Only, Cataract Plus Glaucoma or Cataract Plus High Myopia”. Journal of Ophthalmology (Ukraine), no. 3, Sept. 2025, pp. 15-22, doi:10.31288/oftalmolzh202131522.