I don't have any references to cite this material as it comes purely from personal knowledge and experience. Heather 21:14, 7 May 2007 (UTC)Glitzy_queen00
- I added two references I found in the web. Maybe you can extract some valuable information from them, i.e. timing examples. --Hg6996 (talk) 13:44, 27 October 2012 (UTC)