1. Abnormal head posture;Nutt;Br Orthopt J,1963
2. The ocular significance of abnormal head postures;Wesson;Br Orthopt J,1964
3. Abnormal head positions due to ocular problems;Hiatt;Ann Ophthalmol,1978
4. Head tilt in vertical muscle paresis;Urist;Am J Ophthalmol,1970
5. Absence of spontaneous head .tilt in superior oblique muscle palsy;Burian;Am J Ophthalmol,1975