(en) Kathryn Kish Sklar, Anja Schüler, Susan Strasser, Social justice feminists in the United States and Germany. A dialogue in documents 1885-1933, Cornell University Press, (lire en ligne)
(en) Steven Potter, « Lida Gustava Heymann (1868-1943) », sur Towards Emancipation? Women in Modern European History: A Digital Exhibition & Encyclopedia (consulté le )