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25. Quantification of the role of spatial frequencies of patterns in visual recognition of numbers. Borisova ED. Hum Physiol; 1983; 9(6):434-9. PubMed ID: 6680387 [No Abstract] [Full Text] [Related]
33. Further experiments on estimation of spatial phase of gratings. Nyman G, Laurinen P, Radil T. Act Nerv Super (Praha); 1989 Jun; 31(2):145-7. PubMed ID: 2800961 [No Abstract] [Full Text] [Related]