Shlaer, Robert (26 de mayo de 1972). «An Eagle's Eye: Quality of the Retinal Image». Science (Washington DC: American Association for the Advancement of Science) 176 (37): 920-922. PMID5033635. doi:10.1126/science.176.4037.920.
Shlaer, Robert (26 de mayo de 1972). «An Eagle's Eye: Quality of the Retinal Image». Science (Washington DC: American Association for the Advancement of Science) 176 (37): 920-922. PMID5033635. doi:10.1126/science.176.4037.920.