Imam Zayn al-`Abideen
- A collection of articles and audio resources, from a Shia perspective, about the Fourth Imam and the after-effects of Karbala.
- http://al-islam.org/topical.php?sid=305657393&cat=124

Ali Zayn l-Abidin
- Profile of the Fourth Imam, the only son of Hoeyn to survive Karbala; from the Encyclopedia of the Orient.
- http://i-cias.com/e.o/4thimam.htm

The Illustrious Period of the Imamate of Imam Zayn al-'Abidin
- An article with a profile of the Imam, his teachings, and his role in reuniting the Shia community after Karbala.
- http://al-islam.org/al-serat/Illustrious.htm

Ali bin Hussein (A.S)
- An online book; a biography of the fourth Imam, Imam Zainul Abidin. Includes sections on the aftermath of the Tragedy of Kerbala, and the political situation in which he was martyred.
- http://home.swipnet.se/islam/imamsajjad.htm