Esther Frumkin born Khaye Malke Lifshits (1880-1943), published under the mononym Esther, Yiddish: עסטער, was a leader of the Yiddish socialist General Jewish Labour Bund in Lithuania, Poland and Russia, and later of the Yevsektsiya in the Soviet Union.
- Esther Frumkin - Jewish Women: A Comprehensive Historical Encyclopedia (Jewish Women's Archive)
- de Haan, Fransisca (2006). Biographical Dictionary of Women's Movements and Feminisms in Central, Eastern, and South Eastern Europe. Central European University Press. pp. 140–143.
- Lifshits, Khaye Malke - YIVO Encyclopedia of Jews in Eastern Europe