The angular selectivity of visual cortical cells to moving gratings. Campbell, F., Cleland, B., Cooper, G., & Enroth-Cugell, C. J. Physiol., 198:237-250, 1968.
bibtex   
@article{ Campbell_etal68,
  author = {Campbell, F.W. and Cleland, B.G. and Cooper, G.F. and Enroth-Cugell,
	C.},
  title = {The angular selectivity of visual cortical cells to moving gratings},
  journal = {J. Physiol.},
  year = {1968},
  volume = {198},
  pages = {237-250},
  en_number = { }
}

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