• Full Risala of Ibn Abi Zayd in English
http://www.diafrica.org/nigeriaop/kenny/RISALA.htm

• Shaykh Hamza Yusuf on Pre-Calculated Calendar (ISNA - Fiqh Council)
http://www.zaytuna.org/articleDetails.asp?articleID=100

• Habib Zayn ibn Sumayt's and Other Treatises in Full
In Arabic. On Sayyid Yusuf al-Rifa`i's site:
http://www.rifaieonline.com/shobhat.html

- Ibn Rajab's Refutation of Him [Ibn Taymiyya] Who Follows Other than the Four Schools:
http://www.rifaieonline.com/book15.htm

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