diff --git a/doc/src/Splines/Splines.do.txt b/doc/src/Splines/Splines.do.txt
index 8916c0b2b..cc0aad5f0 100644
--- a/doc/src/Splines/Splines.do.txt
+++ b/doc/src/Splines/Splines.do.txt
@@ -6,7 +6,7 @@ DATE: today
 ===== To do =====
 * make plot of SGD moves
 * idem for standard GD for simple minimization problem
-* more material on autograd with examples
+* more material on autograd with examples, discuss in particular the algorithm behind it, look up Journal of Computational and Applied Mathematics 124 (2000) 171 190
 * develop an example for logistic regression (for example the breast cancer data)