https://academic.oup.com/cercor/article/13/3/225/355481 (Publisher version)
Swindale, N., Grinvald, A., & Shmuel, A. (2003). The Spatial Pattern of Response Magnitude and Selectivity for Orientation and Direction in Cat Visual Cortex. Cerebral Cortex, 13(3), 225-238. doi:10.1093/cercor/13.3.225.