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См. Uri Polat, Clifton Schor, Jian-Liang Tong, Ativ Zomet, Maria Lev, Oren Yehezkel, Anna Sterkin, and Dennis M. Levi. “Training the brain to overcome the effect of aging on the human eye,” Scientific Reports 2 (2012): 278, doi:10.1038/srep00278.