Shabbetai Zevi - Extensive article on the messianic figure with reference to Karen Armstrong's book "A History of God" and Gershom G. Scholem's text "Sabbati Sevi".
Jacob Frank - Article on the eighteenth century messianic leader who took over a remnant of Sabbatai Zevi's followers in Europe.
Donmeh - Wikipedia - Online encyclopedia article on the group who followed Sabbatai Zvi.
Dajjals, Donmehs and Extra - Terrestrials - Islamic view on the "crypto-Jewish" Donmeh community in Turkey which formally converted to Islam with Sabbatai Zvi in the seventeenth century.