- Author: Markus John
- Language: English
- Year: 1968
- Author: Berlin Howard M.
- Language: English
- Year: 1978
- Author: Hickman Ian
- Language: English
- Year: 1999
- Author: M. Iranzo Pontes, F. Montilla Meoro, E. Batalla Vinals, A. Hibernón García Morell, A. Guill Ibañez
- Language: Spanish
- Year: 1998