Came across this thoughtful article might be of interest  <a href=http://www.mizmiz.de/read-blog/118471_%D1%82%D1%83%D1%80%D0%B5%D1%86%D0%BA%D0%B8%D0%B5-%D1%81%D0%B5%D1%80%D0%B8%D0%B0%D0%BB%D1%8B-%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD-%D0%BD%D0%B0-%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC.html>http://www.mizmiz.de/read-blog/118471_%D1%82%D1%83%D1%80%D0%B5%D1%86%D0%BA%D0%B8%D0%B5-%D1%81%D0%B5%D1%80%D0%B8%D0%B0%D0%BB%D1%8B-%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD-%D0%BD%D0%B0-%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC.html</a>