diff --git a/semester3/numcs/parts/02_quadrature/04_in-rd.tex b/semester3/numcs/parts/02_quadrature/04_in-rd.tex
index 0452ed1..a04a8ac 100644
--- a/semester3/numcs/parts/02_quadrature/04_in-rd.tex
+++ b/semester3/numcs/parts/02_quadrature/04_in-rd.tex
@@ -17,6 +17,8 @@ und für beliebige $d$ haben wir
 \drmvspace
 Which has the same form as above, but with $d$ sums and $d$ times a $w_{j_k}$ and a $d$-dimensional function $f$
 
+% https://www.slingacademy.com/article/scipy-integrate-simpson-function-4-examples/ explains scipy's n-d integration well
+
 \begin{recall}[]{Tensor-Produkt}
     \TODO Write this section
 \end{recall}