HELVESTON, EM. A new classification of superior oblique palsy based on congenital variations in the tendon. Ophthalmology. 1992, 99, 1609-1615
PAYSEE, EA. Facial asymmetry and tendon laxity in superior oblique palsy. J Ped Ophthalmol Strabismus. 1995, 32, 158-161
GOODMAN, CR. Should early strabismus surgery be performed for ocular torticollis to prevent facial asymmetry?. J Ped Ophthalmol Strabismus. 1995, 32, 162-166