Kyrychok T, Korotenko O, Talimonov Y, Kyrychok A. Improving a method for determining the level of wear of the mark for people with visual impairments on Ukrainian hryvnia banknotes. EEJET [Internet]. 2023Oct.31 [cited 2024May20];5(1 (125):92-103. Available from: https://journals.uran.ua/eejet/article/view/287746