Zheliznik M, Serdiuchenko V, Dragomiretska O. School-day biorhythms of threshold exposure duration for recognition of test objects in schoolchildren of grades 7 to 11. Ukr. j. ophthalmol. [Internet]. 2026 Jun. 30 [cited 2026 Jun. 30];(6):3-5. Available from: https://ua.ozhurnal.com/index.php/files/article/view/947