1. Krasnov MM . Sinusotomy: foundations, results, prospects. Trans Am Ophthalmol Otolaryngol 1972; 76: 369–374.
2. Zimmerman TJ, Kooner KS, Ford VJ, Olander KW, Mandlekorn RM, Rawlings EF et al. Trabeculectomy vs non-penetrating trabeculectomy: a retrospective study of two procedures in phakic patients with glaucoma. Ophthalmic Surg 1984; 15: 734–740.
3. Fyodorov SN . Non penetrating deep sclerectomy in open angle glaucoma. Eye Microsurg 1989; 3: 52–55 (in Russian).
4. Arenas E . Trabeculectomy ab-externo. Highlights Ophthalmol 1991; 19: 59–66.
5. Stegmann RC . Visco-canalostomy: a new surgical technique for open angle glaucoma. An Inst Barraquer (Spain) 1995; 25: 229–232.