1. The role of the developmental anomalies in vertical muscle defects;Fink;Am J Ophthalmol,1955
2. Operative Therapie bei einem Fall mit doppeltem M;Haase;rectus superior. Klin Monatsbl Augenheilkd,1971
3. Double elevator palsy caused by anomalous insertion of the inferior rectus;McNeer;Am J Ophthalmol,1965
4. Musculus retractor bulbi und drittes Lid bei einer menschlichen Missbildung;Fleischer.;Anat Anz,1907
5. Mühlendyck H, Markakis E, Helwig AT. Abnormal retraction syndrome due to persistent retractor bulbi. In Kaufman H, editor. Transactions of the 19th meeting of the European Strabological Association, Crete. 1991:169–73.