For citations:
Yani E.V., Iomdina E.N., Pozdniakova V.V., Golikova V.A., Seliverstova K.E. Treating protracted corneal ulcers with UVA corneal collagen crosslinking: clinical cases. Russian Ophthalmological Journal. 2021;14(3):106-112. (In Russ.) https://doi.org/10.21516/2072-0076-2021-14-3-106-112