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DOYMA, E. (2015). Journal of Optometry (April-June 2015, Vol. 8, n.2, page 131-139). Spanish: Elsevier Espana.

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DOYMA, Elsevier. "Journal of Optometry". April-June 2015, Vol. 8, n.2, page 131-139 Spanish: Elsevier Espana, 2015. Text.