^Toczolowski J (1993). "Thirty years of cryoophthalmology". Ann Ophthalmol. 25 (7): 254–6.
PMID8363292.
^Kiratli H, Bilgiç S (1998). "Cryoextraction in the management of orbital tumors. An old technique revisited". Orbit. 17 (3): 189–194.
doi:
10.1076/orbi.17.3.189.2753.
PMID12048727.