1. Prevalence of strabismus in Finland;Rantanen, A.; Tommila, V.;Acta Ophthalmol (Kbh),1971
2. Refractive errors and other ocular findings in school children;Laatikainen, L.; Erkkila, H.;Acta Ophthalmol (Kbh),1980
3. Binocular Vision and Ocular Motility: Theory and Management of Strabismus;Burian, H.M.; von Noorden, G.K.
4. Occurrence of squint;Frandsen, A.D.;Acta Ophthalmol (Kbh)
5. Occurrence and cause of blindness in Finland;Vannas, S.; Raivio, T.;Acta Ophthalmol (Kbh),1964