- Author: fl. ca. 1196 Ambroise
- Language: English
- Year: 1976
- Author: von Bremen Adam Francis Joseph Tschan
- Language: English
- Year: 1959
- Author: Harry August Rositzke
- Language: English
- Year: 1951
- Author: James F. Kenney
- Language: English
- Year: 1966
- Author: Pope Sylvester II Harriet Pratt Lattin
- Language: English
- Year: 1961
- Author: William Harris. Stahl Richard Johnson E. L. Burge
- Language: English
- Year: 1971
- Author: George Vernadsky
- Language: English
- Year: 1979
