SUTHERLAND, N S The visual discrimination of shape by octopus: squares and rectangles. [electronic resource] - Journal of comparative and physiological psychology Feb 1960 - 95-103 p. digital Publication Type: Journal Article ISSN: 0021-9940 Standard No.: 10.1037/h0038429 doi Subjects--Topical Terms: AnimalsHumansOctopodiformesShellfishVision, OcularVisual Perception