1. Anon. (1887). “Dr. L. Thollon.” Observatory 10: 207.
2. Guébhard, Adrien (1879). “Le spectroscope et ses derniers perfectionnements.” La Nature 7, 2nd semester: 223–226.
3. Hentschel, Klaus (2002). Mapping the Spectrum: Techniques of Visual Representation in Research and Teaching. Oxford: Oxford University Press.
4. — (2002). “Spectroscopic Portraiture.” Annals of Science 59: 57–82.
5. Janssen, Pierre Jules César (1887). “La mort de M. Thollon.” Comptes rendus de l’Académie des sciences 104: 1047–1048.