1. 1. Watson A: A new operation for double elevator paresis. Trans Canad Ophth Soc 25:182 1962.
2. 2. Knapp ?: The surgical treatment of double elevator paralysis. Trans Amer Ophth Soc 67:304 1969.
3. 3. Uribe L: Muscle transplantation in ocular paralysis. Amer J Ophth 65:601 1968.
4. 4. Dunlap E: Vertical Displacement of Horizontal Recti in Strabismus: a Symposium. St. Louis CV Mosby (in press).
5. 5. Hummelsheim E: Über sehnen transplan tat ion am auge. Ber ver Ophth Gesellschft 34:248 1907.