בבילוגרפיה

* ידע אישי
*http://www.snunit.k12.il/science/biology/anox.html
*http://www.infomed.co.il/questions/q_061002_1.htm
*http://www.narrative.co.il/
*http://he.wikipedia.org/wiki/%D7%90%D7%A0%D7%95%D7%A8%D7%A7%D7%A1%D7%99%D7%94
*http://www.sane-way.com/site/detail/detail/detailDetail.asp?detail_id=142118&depart_id=8201