Wheelwright, Julie (2004). "Yudenitch [Yudenich], Flora Sandes (1876–1956)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/49662. (Subscription or UK public library membership required.)
Wheelwright, Julie (2004). "Yudenitch [Yudenich], Flora Sandes (1876–1956)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/49662. (Subscription or UK public library membership required.)