Collinearity and parallelism are statistically significant second-order relations of complex cell responses
@Article{nkrueger98npl,
  author = 	 {N. Kr{"u}ger},
  title = 	 {Collinearity and parallelism are statistically significant second-order relations of complex cell responses},
  journal = 	 {Neural Processing Letters},
  volume =       {8},
  year = 	 1998,
  pages =        {117-129},
  }