↑"Although by 1968 he could be seen as the “grandfather of the French homosexual movement” , Daniel Guérin has always been better known outside gay circles for his rôle in the revolutionary movement. On the revolutionary left of the Socialist Party in the 1930s, he was later heavily influenced by Trotsky, before becoming attracted to the libertarian communist wing of the anarchist movement." David Berry. "For a dialectic of homosexuality and revolution"
↑Karl Heinrich Ulrichs had begun a journal called Prometheus in 1870, but only one issue was published. (Kennedy, Hubert, Karl Heinrich Ulrichs: First Theorist of Homosexuality, In: 'Science and Homosexualities', ed. Vernon Rosario (pp. 26–45). New York: Routledge, 1997.
↑Hubert Kennedy. p. 7. Archivado desde el original el 4 de marzo de 2016. Consultado el 28 de junio de 2016.