1. Zappia V, Kennedy P, Nison BI, Galletti P. Novel Biochemical, Pharmacological and Clinical Aspects of Cytidinediphosphocoline, New York; Elsevier, 1985.
2. Campos EC, Schiavi C, Benedetti P, Bolzani R, Porciatti V. Effect of citicoline on visual acuity in amblyopia: preliminary results. Graefe's Arch Clin Exp Ophthalmol 1995: 233: 307–312.
3. Porciatti V, Benedetti P, Schiavi C, Domenici L, Campos EC. Citicoline treatment improves contrast sensitivity and VEPs of strabismic amblyopes. Invest Ophthalmol & Visual Sci 1994; 35/4: 1994.
4. Noorden GK von. Binocular Vision and Ocular Motility. Theory and Management of Strabismus. 5th Edition. St. Louis; CV Mosby, 1995.
5. Campos EC. Amblyopia. Surv Ophthalmol 1995; 40: 23–39.