1. Early diagnosis of siderosis retinae by use of electroretinography;Karpe;Docum. Ophth.,1948
2. Das Elektroretinogramm bei Siderosis bulbi;Karpe;Bibl. Ophth.,1957
3. Electroretinography in eyes with retained intraocular metallic foreign bodies;Knave;A clinical study. Acta Ophth.,1969a
4. Knave , B. 1969b The ERG and ophthalmological changes in experimental metallosis in the rabbit. I. Effects of iron particles