diff --git a/content/_index.md b/content/_index.md
index 8f824a9..232c6fc 100644
--- a/content/_index.md
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@@ -12,9 +12,9 @@ I have written these notes for myself, I thought it would be cool to share them.
[Variation of parameters (lec 9-10)](variation-of-parameters-lec-9-10.html)
[Cauchy-Euler equations (lec 10)](cauchy-euler-equations-lec-10.html) (raw notes, not reviewed or revised yet.)
[Free vibrations (lec 11-12)](free-vibrations-lec-11-12.html) (raw notes, not reviewed or revised yet.)
-[Resonance & AM (lec 13-14)](resonance-am-13-14.html)
+[Resonance & AM (lec 13-14)](resonance-am-lec-13-14.html)
[Laplace transform (lec 14)](laplace-transform-lec-14.html)
[How to solve any DE, a flow chart](Solve-any-DE.png)
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diff --git a/themes/zettels/layouts/_default/baseof.html b/themes/zettels/layouts/_default/baseof.html
index a4a7bdc..3a71b48 100644
--- a/themes/zettels/layouts/_default/baseof.html
+++ b/themes/zettels/layouts/_default/baseof.html
@@ -2,10 +2,10 @@
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