diff --git a/src/includes/features/calc/tutorials.html b/src/includes/features/calc/tutorials.html
index 725156b..eff53ec 100644
--- a/src/includes/features/calc/tutorials.html
+++ b/src/includes/features/calc/tutorials.html
@@ -1,4 +1,5 @@
 <ul>
   <li><a href="https://vincentp.me/blog/use-cases-for-calc/">Use Cases For CSS Calc</a></li>
   <li><a href="https://www.smashingmagazine.com/2015/12/getting-started-css-calc-techniques/">Getting Started With CSS calc()</a></li>
-</ul>
\ No newline at end of file
+  <li><a href="https://stackdiary.com/css-math-functions/">How to Use CSS Math Functions: calc, min, max, clamp</li>
+</ul>