Autore:Charles Robert Richet

- ↑ www.armb.be
- ↑ 2,0 2,1 Gemeinsame Normdatei
- ↑ Bibliothèque nationale de France
- ↑ 4,0 4,1 Encyclopædia Britannica
- ↑ Internet Speculative Fiction Database
- ↑ Grande Enciclopedia Sovietica 1969–1978
- ↑ Who Named It?
- ↑ Brockhaus Enzyklopädie