Grzybowski , A., and A. Maciejewski. “Increase in the Number of Cataract Surgeries Performed under the Cross-Border Directive of 2016”. OphthaTherapy. Therapies in Ophthalmology, Vol. 4, no. 1, Mar. 2017, pp. 10-14, doi:10.24292/01.ot.310317.02.