קצת מאמרים :
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http://www.kilogram.co.il/1904/%D7%A9%D7%9E%D7%95%D7%A0%D7%94-%D7%9E%D7%99%D7%AA%D7%95%D7%A1%D7%99%D7%9D-%D7%98%D7%99%D7%A4%D7%A9%D7%99%D7%99%D7%9D-%D7%9C%D7%92%D7%91%D7%99-%D7%91%D7%99%D7%A6%D7%95%D7%A2-%D7%A1%D7%A7%D7%95%D7%95/