[1] Teuffel's most important work was his Geschichte der römischen Litteratur (1870); revisions by Ludwig Schwabe, Wilhelm Kroll and Franz Skutsch carried this to a 6th–7th edition (1913–1920).
[citation needed] An English translation of the 5th edition by George Charles Winter Warr was published in 1891–1892, as Teuffel's History of Roman Literature.
The Encyclopædia Britannica Eleventh Edition described Teuffel's history as "written in an unattractive style" but "indispensable to the student" especially for its "bibliographical information",[1] and Warr's translation is described in the 1996 Oxford Classical Dictionary as "still useful on details".
After the death of August Pauly, the editor of the well-known Realencyclopädie der classischen Altertumswissenschaft, Teuffel, at first assisted by Ernst Christian Walz, undertook the completion of the work, to which he also contributed numerous articles.
[1] He was also the author of and of editions of His Studien und Charakteristiken (1871; 2nd ed., 1889) contain valuable contributions to the history of Greek and Roman literature.