1. Die ophthalmoskopische Erkennbarkeit des Sehpurpurs;Abelsdorff;Z. Psychol. Physiol. Sinnesorg,1897
2. Physiologische Beobachtungen am Auge der Krokodile;Abelsdorff;Arch. Anat. Physiol. (Physiol.),1898
3. Light-sensitive pigment in the visual cells of the frog;Arden;J. Physiol.,1954
4. The dark reactions in visual cell suspensions;Arden;J. Physiol.,1954
5. A narrow-band pigment present in visual cell suspensions;Arden;J. Physiol.,1954