Added video references

css-color/Overview.bs

@@ -153,9 +153,9 @@ Notes On Using Colors</h3>
 	An <dfn export>untagged image</dfn> is an image that is not explicitly assigned a color profile, as defined by the image format.
 
 	Note that this rule does not apply to videos, since untagged video should be presumed to be in ITU.
-	* At below 720p, it is Recommendation ITU-R BT.601
-	* At 720p, it is SMPTE ST 296 (same colorimetry as 709)
-	* At 1080p, it is Recommendation ITU-R BT.709
+	* At below 720p, it is Recommendation ITU-R BT.601 [[!ITU-R-BT.601]]
+	* At 720p, it is SMPTE ST 296 (same colorimetry as 709) [[!SMPTE-ST-296]]
+	* At 1080p, it is Recommendation ITU-R BT.709 [[!ITU-R-BT.709]]
 
 	Issue:
 		Really?  Isn't HD video in Rec.709? Shouldn't video be consistent with images?

css-color/biblio.json

@@ -0,0 +1,14 @@
+{
+    "ITU-R-BT.601": {
+        "href": "https://www.itu.int/rec/R-REC-BT.601/en",
+        "title": "Recommendation ITU-R BT.601"
+    },
+    "ITU-R-BT.709": {
+       "title": "Recommendation ITU-R BT.709",
+       "href": "https://www.itu.int/rec/R-REC-BT.709/en"
+    },
+    "SMPTE-ST-296": {
+       "title": "SMPTE ST 296",
+       "href": "http://ieeexplore.ieee.org/document/7291722/"
+    }
+}