Tsaddikim: Zevulun - Presenting the Chassidic position on the son of Jacob, including traditional birth and death dates. - http://judaicaplus.com/Tzadikim/zevulun.htm
Zebulun - Biblical biography of the Israelite tribal head. - http://www.execulink.com/~wblank/20001008.htm
Jewish Encyclopedia: Zebulun - Profile of the tenth son of Jacob. - http://www.jewishencyclopedia.com/view.jsp?artid=61&letter=Z
Catholic Encyclopedia: Zabulon - Commentary on the son of Jacob from the traditional Catholic perspective. - http://www.newadvent.org/cathen/15739b.htm