diff --git a/ampcamp/time-series-tutorial-AR.md b/ampcamp/time-series-tutorial-AR.md
index bb99625..9e81f02 100644
--- a/ampcamp/time-series-tutorial-AR.md
+++ b/ampcamp/time-series-tutorial-AR.md
@@ -10,6 +10,8 @@ skip-chapter-toc: true
 
 # Time series analysis on surrogate data.
 
+https://github.com/bellettif/sparkGeoTS
+
 ## Getting started:
 In the shell, from the usb/spark/, please enter
 
@@ -268,4 +270,4 @@ jointly into account.
     println("Multivariate average error magnitude = " + sqrt(trace(residualSecondMomentVAR) / d))
     println()
 </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/ampcamp/time-series-tutorial-taxis.md b/ampcamp/time-series-tutorial-taxis.md
index 56218ef..ef24974 100644
--- a/ampcamp/time-series-tutorial-taxis.md
+++ b/ampcamp/time-series-tutorial-taxis.md
@@ -10,6 +10,8 @@ skip-chapter-toc: true
 
 # Time series analysis on taxi data in New York.
 
+https://github.com/bellettif/sparkGeoTS
+
 ## Getting started:
 In the shell, from the usb/spark/, please enter