1. Disease of the sac and duct;Hurwitz,1996
2. Endonasal laser dacryocystorhinostomy;Massaro;Arch Ophthalmol,1990
3. Nuovo metodo conservatore dicura radicale delle soppurazioni croniche del sacco lacrimale (dacriocistorinostomia);Toti;Clin Moderna,1904
4. A report of 131 cases of endoscopic laser lacrimal surgery;Kong;Ophthalmology,1994
5. Epiphora;Munk;Radiology,1990