Varga JH, Rubinfeld RS, Wolf TC, et al. (July 1997). "Topical anesthetic abuse ring keratitis: report of four cases". Cornea. 16 (4): 424–9. doi:10.1097/00003226-199707000-00009. PMID9220240.
Ardjomand N, Faschinger C, Haller-Schober EM, Scarpatetti M, Faulborn J (November 2002). "[A clinico-pathological case report of necrotizing ulcerating keratopathy due to topical anaesthetic abuse]". Ophthalmologe (in German). 99 (11): 872–5. doi:10.1007/s00347-002-0623-z. PMID12430041. S2CID20724555.
Varga JH, Rubinfeld RS, Wolf TC, et al. (July 1997). "Topical anesthetic abuse ring keratitis: report of four cases". Cornea. 16 (4): 424–9. doi:10.1097/00003226-199707000-00009. PMID9220240.
Ardjomand N, Faschinger C, Haller-Schober EM, Scarpatetti M, Faulborn J (November 2002). "[A clinico-pathological case report of necrotizing ulcerating keratopathy due to topical anaesthetic abuse]". Ophthalmologe (in German). 99 (11): 872–5. doi:10.1007/s00347-002-0623-z. PMID12430041. S2CID20724555.
Ardjomand N, Faschinger C, Haller-Schober EM, Scarpatetti M, Faulborn J (November 2002). "[A clinico-pathological case report of necrotizing ulcerating keratopathy due to topical anaesthetic abuse]". Ophthalmologe (in German). 99 (11): 872–5. doi:10.1007/s00347-002-0623-z. PMID12430041. S2CID20724555.