- Author: Igor de Rachewiltz
- Language: English
- Year: 1972
- Author: Igor de Rachewiltz
- Language: English
- Year: 2013
- Author: Igor de Rachewiltz
- Language: English
- Year: 2004
- Author: Igor de Rachewiltz and Volker Rybatzki. With the collaboration of Hung Chin-fu
- Language: English
- Year: 2010