Κλικ εδώ--> http://youtu.be/yzQ2yKBGyro
και εδώ--> http://www.slideshare.net/kikh/h-14973427?ref=http://45dimpatras.blogspot.gr/2013/10/45dim-patras.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+blogspot/tYRqN+(45%CE%BF+%CE%B4%CE%B7%CE%BC%CE%BF%CF%84%CE%B9%CE%BA%CF%8C+%CF%83%CF%87%CE%BF%CE%BB%CE%B5%CE%AF%CE%BF+%CE%A0%CE%B1%CF%84%CF%81%CF%8E%CE%BD)
