diff --git a/cesium-integration.md b/cesium-integration.md
index 42cd738..960cedb 100644
--- a/cesium-integration.md
+++ b/cesium-integration.md
@@ -9,6 +9,8 @@ See example with OpenLayers 2 and Google Earth plugin: http://plan.epfl.ch/?lang
 ## Smooth transition between 2d and 3d
 Idea: A la google map, share the bottom line and tilt. Forward and Backward.
 
+Some thoughts about the camera movement: https://gist.github.com/tonio/750dbc843ef95601c4be (might be outdated with the experience of the following POCs)
+
 Ongoing work:
 * 1. POC: http://bl.ocks.org/tonio/raw/9759909/
 * To be developed further: http://bl.ocks.org/gberaudo/raw/51f050326d91d4e9c09a/1b55ad64a1f3de2dcba5673ecb52f976104a4592/#