1. Laser versus non-laser endonasal dacryocystorhinostomy;Maini;Cochrane Database Syst Rev.,2002
2. Endonasal versus external dacryocystor-hinostomy for nasolacrimal duct obstruction;Paleri;Cochrane Database Syst Rev.,2001
3. Clinicopathologic analysis of 166 patients with primary acquired nasolacrimal duct obstruction;Lee-Wing;Ophthalmology.,2001
4. Adult nasolacrimal duct obstruction;Shermetaro;J Am Osteopath Assoc.,1994
5. Two new operations for obstruction of the nasal duct;Caldwell;NY Med J.,1893