1. Ein Fall von angeborener Difformitat der Sehnervenpapille;Wiethe;Arch Augenh,1882
2. The pathology of coloboma at the nerve entrance;Coats;Roy Lond Ophth Hosp Rep,1908
3. Crater-like hole in the disc associated with changes at the macula;James;Ophthal Rev,1913
4. Pits on the optic disc;Neilsen;Acta Ophthalmol,1924
5. Crater-like hole and coloboma of the disc associated with changes at the macula;Halbertsma;Br J Ophthalmol,1927