Aragona, P; Spinella, R; Rania, L; Postorino, E; Sommario, M. S.; Roszkowska, A. M.; Puzzolo, D (2013). “Safety and efficacy of 0.1% clobetasone butyrate eyedrops in the treatment of dry eye in Sjögren syndrome”. European Journal of Ophthalmology. 23 (3): 368–76. doi:10.5301/ejo.5000229. PMID23225089.
Aragona, P; Spinella, R; Rania, L; Postorino, E; Sommario, M. S.; Roszkowska, A. M.; Puzzolo, D (2013). “Safety and efficacy of 0.1% clobetasone butyrate eyedrops in the treatment of dry eye in Sjögren syndrome”. European Journal of Ophthalmology. 23 (3): 368–76. doi:10.5301/ejo.5000229. PMID23225089.