added paper suggested by reviewer to references

rebuttal2.tex

@@ -277,7 +277,7 @@
   contrast increases, when theory predicts that higher signal-to-noise
   ratios should result in larger nonlinearities?}
 
-\response{NOT WEAK ANY MORE. DEVIATION FROM SQUARE DEPENDENCE. BENJI!}
+\response{NOISE STIMULUS LINEARIZES. BENJI. BUt also highlight the difference between noise and sinewae stimulation in other parts of the manuscript.}
 
 \issue{(12) Lines 655-675. This was a very nice end to the discussion,
   but I would like to see more. I would like the broader significance

references.bib

@@ -7113,3 +7113,30 @@ microelectrode recordings from visual cortex and functional implications.},
   pages={145--156},
   year={1981},
 }
+
+@article{Nogueira2013,
+  title={From the intrinsic properties to the functional role of a neuron phenotype: an example from electric fish during signal trade-off.},
+  author={Javier Nogueira and Angel A. Caputi},
+  journal={J Exp Biol},
+  volume={216},
+  pages={2380--2392},
+  year={2013},
+}
+
+@article{Nogueira2014,
+  title={Pharmacological study of the one spike spherical neuron phenotype in {\textit{Gymnotus omarorum}}.},
+  author={Javier Nogueira and Angel A. Caputi},
+  journal={Neuroscience},
+  volume={258},
+  pages={347--354},
+  year={2014},
+}
+
+@article{Smith2006,
+  title={Distribution of {Kv1}-like potassium channels in the electromotor and electrosensory systems of the weakly electric fish {\textit{Apteronotus leptorhynchus}}.},
+  author={G. Troy Smith and Graciela A. Unguez and Christopher M. Weber},
+  journal={J Neurobiol},
+  volume={66},
+  pages={1011--1031},
+  year={2006},
+}