1. Su alcune forme atipiche o rare di degenerazione retinica;Bietti;Boll. Ocul.,1937
2. The electroretinographic and electro-oculographic findings in patients with macular lesions;Krill;Tr. Am. Acad. Ophth. Ot.,1966
3. Flecked retina syndrome;Krill;Arch, Ophth.,1965
4. Fluorescein angiography in retinitis pigmentosa;Krill;Am. J. Ophth.,1970