Grzybowski , Andrzej, Arnold Maciejewski, and Justyna Zajdel. 2016. “Costs and Risks Associated With Cataract Surgery Financed under the Cross-Border Directive”. OphthaTherapy. Therapies in Ophthalmology 3 (3), 218-23. https://journalsmededu.pl/index.php/ophthatherapy/article/view/621.