Wade, KAITLYJJ.; Finger, Stanley (2001). «The eye as an optical instrument: from camera obscura to Helmholtz's perspective». Perception30 (10): 1157-77. PMID11721819. doi:10.1068/p3210.
Wade, KAITLYJJ.; Finger, Stanley (2001). «The eye as an optical instrument: from camera obscura to Helmholtz's perspective». Perception30 (10): 1157-77. PMID11721819. doi:10.1068/p3210.