Nothing more than a pair of curvatures: A common mechanism for the detection of both radial and non-radial frequency patterns
Vision Research (2017) - Comments
pubmed: 28404520  doi: 10.1016/j.visres.2017.03.005  issn: 1878-5646  issn: 0042-6989 

Gunnar Schmidtmann, Frederick A.A. Kingdom