Baker, R. S., Bonner, P. H., Porter, J. D., Madhat, M. N., & Gross, J. (1969). Myoblast transfer therapy in the treatment of ptosis: a preliminary study. Journal Of Pediatric Ophthalmology And Strabismus, 30(2), 113-7. https://doi.org/10.3928/0191-3913-19930301-12 (Original work published 1969)