diff --git a/urls.txt b/urls.txt
index 9da9f09..c482f65 100644
--- a/urls.txt
+++ b/urls.txt
@@ -1,28 +1,29 @@
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-pref-May16.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch1-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch2-jun5.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch3-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch4-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch5-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch6-jul10.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch1-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch2-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch3-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch4-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch5-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch6-3aug.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch7-3aug.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch8-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch9-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch10-jul10.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch11-jan7.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch12-jul10.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch13-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch14-dec20.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch15-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch16-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch17-dec20.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch18-dec18.pdf
-https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch19-dec18.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch9-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch10-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch11-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch12-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch13-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch14-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch15-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch16-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch17-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch18-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch19-3aug.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch20-mar17.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch21-mar17.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch22-jul10.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch23-jun5.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch24-3aug.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch25-jul10.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch26-3aug.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch27-3aug.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch28-3aug.pdf