ELKE SOMMER, FemBio-Datenbank[*][[FemBio-Datenbank (database of women's biographies)|]]|access-date= necesită |url= (ajutor)
The International Who's Who of Women 2006[*][[The International Who's Who of Women 2006 (biographical reference work published in 2006 and edited by Elizabeth Sleeman)|]]Verificați valoarea |titlelink= (ajutor)