Talk:Periodic point

Text Book
I want to urge Wikipedia to give a section called "Systematic study" for all technical or academic topics so that one who is interested can read about it. e.g. I know this is realted to functions but I am not sure what other 'text books' I should read to better understand this. Can anybody point me to the text book covering this topic? — Preceding unsigned comment added by 117.198.121.106 (talk) 08:13, 27 October 2012 (UTC)