16. SELENOW A., BAUER E.A., ALI S.R., SPENCER L.W., CIUFFREDA K.J.: Assessing visual performance with progressive addition lenses. Optometry and vision science 79 (8) S. 502 - 505 (2002)

16. SELENOW A., BAUER E.A., ALI S.R., SPENCER L.W., CIUFFREDA K.J.: Assessing visual performance with progressive addition lenses. Optometry and vision science 79 (8) S. 502 - 505 (2002)