diff --git a/html/CPV.html b/html/CPV.html
index c1a705b..e1f277d 100644
--- a/html/CPV.html
+++ b/html/CPV.html
@@ -60,10 +60,12 @@
 </section>
 
 
+<section data-min-level="5">
 <hr>
 <h5>Resources</h5>
 <ul>
-  <li><a href="http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.13.138" target="_blank">The original publication by Cronin, Fitch et al.</a></li>
   <li><a href="http://en.wikipedia.org/wiki/CP_violation" target="_blank">Wikipedia on CP violation</a></li>
-  <li><a href="http://en.wikipedia.org/wiki/Kaon#CP_violation_in_neutral_meson_oscillations" target="_blank">Neutral kaon mixing on Wikipedia</a></li>
+  <li data-min-level="10"><a href="http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.13.138" target="_blank">The original publication by Cronin, Fitch et al.</a></li>
+  <li data-min-level="10"><a href="http://en.wikipedia.org/wiki/Kaon#CP_violation_in_neutral_meson_oscillations" target="_blank">Neutral kaon mixing on Wikipedia</a></li>
 </ul>
+</section>