diff --git a/cesium-integration.md b/cesium-integration.md
index bf2d5e7..cd7cf4f 100644
--- a/cesium-integration.md
+++ b/cesium-integration.md
@@ -28,7 +28,12 @@ Idea: If a user adds a WMS/TMS/WMTS layer to ol3.js map it should also be added
 
 Known limitations: for now, ol3js and cesium don't support the same layer type:
  * ol3js: WMTS, WMS, OSM, Bing
- * cesiumjs: WMS, TMS, OSM, Bing, ESRI
+ * cesiumjs:
+  * WMS (this is not a single request, but multiple WMS tiled requests, but no WMS-C, can't specify the grid)
+  * TMS,
+  * OSM,
+  * Bing,
+  * ESRI 
 
 WMTS issue, see: https://github.com/AnalyticalGraphicsInc/cesium/issues/1890