J. Richter

A model for the temporal organization of X- and Y-type receptive fields in the primate retina

S. Ullman, J. Richter, 2004, Biological Cybernetics.

Non-linearities in cortical simple cells and the possible detection of zero crossings

S. Ullman, J. Richter, 2004, Biological Cybernetics.

Are non-directional simple cells constructed from directional subunits?

S. Ullman, J. Richter, 1986, Biological cybernetics.