Catholic Encyclopedia: Tertullian Catholic Encyclopedia: Tertullian: Long article on this ecclesiastical writer. (Tertullian) http://www.newadvent.org/cathen/14520c.htm
The Ecole Glossary: Tertullian The Ecole Glossary: Tertullian: Brief biography, by Elise M. Bender. (Tertullian) http://www2.evansville.edu/ecoleweb/glossary/tertullian.html
Early Church.org.uk: Tertullian of Carthage Early Church.org.uk: Tertullian of Carthage: Overview of Tertullian's contributions, methods of exegesis, rhetoric, anti-intellectualism, and Montanism. Includes sources. (Tertullian) http://www.earlychurch.org.uk/tertullian.html
Tertullian On Fasting Tertullian On Fasting: Survey on individual, communal, and stational fasts in Tertullian's Carthaginian community. (Tertullian) http://divinity.library.vanderbilt.edu/burns/chroma/practices/fastmcgowan.htm
Tertullianus, Quintus Septimius Florens Tertullianus, Quintus Septimius Florens: Extensive entry on Tertullian encompasses his life and theological notions, and includes outlines of his tracts. From the Early Christian Writings. (Tertullian) http://www.earlychristianwritings.com/info/tertullian-wace.html
The Tertullian Project The Tertullian Project: Information about this second-century church father, his works, lost works, manuscripts. (Tertullian) http://www.tertullian.org/
Excerpts from Tertullian Excerpts from Tertullian: Comprehensive collection of citations from the Carthaginian writer, arranged by topics and subtopics. (Tertullian) http://www.geocities.com/tertulliancyprian/