Double blind study with application of solcoseryl ophthalmic gel compounds and 2,4% cystein in ophthalmic gen in patients with chronic recurrent keratitis and sicca keratitis - Krzystkowa, Krystyna; Hydzikowa, Marta; Szpytma, Roman (Klinika Oczna / Acta Ophthalmologica Polonica, 1991)