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DOYMA, E. (2015). Journal of Optometry (January-March 2015, Vol. 8, n.1, page 33-39). Spanish: Elsevier Espana.

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DOYMA, Elsevier. "Journal of Optometry". January-March 2015, Vol. 8, n.1, page 33-39 Spanish: Elsevier Espana, 2015. Text.