- Lau, Lucius Cornelius Sulla (1855); E.
- "His goal," says Lau, "was always that which he acknowledged as the best."
- Lau, Gregor I.
- But (with the possible exception of the first) none of these treatises are of Gregorian authorship. See the discussions in Migne, Lau and Dudden.
- Lau, Entwickelung der kommunalen Verfassung der Stadt Koln bis zum Jahre 1396 (Bonn, 1898); K.